Combined with the actual situation in China, the relationship between population development and health was discussed.

The relationship between population development and health. The production of human society includes the production of material materials and the production of human beings themselves, which are interdependent and mutually restrictive. Under the condition of a certain level of economic and production development, population development, that is, the quantity, quality and reproduction speed of the population, determines people's living standards and health levels. (1) Population and healthy population refer to the total population of a country or region in a certain period or period. 1999 this month, the total population of the world has exceeded 6 billion, and it is expected to reach 8 billion in 2025 and 9.3 billion in 2050. At present, the population problem has become a major social problem in the world, especially in many developing countries, the population density is too high and the growth is too fast, which exceeds the carrying capacity of the environment, exacerbates the resource crisis, seriously affects social and economic development, and is not conducive to improving people's health. The impact of overpopulation on human health is mainly manifested in the following aspects: 1. It increases the social burden and affects the quality of life of the population. According to the estimation of population economists, every increase in social population 10% will consume 3% ~ 4% of the gross national product. The rapid population growth leads to the decline of per capita consumption level, which is positively related to population health. 2. Increase the burden of education and medical care and affect the quality of the population. The rapid growth of population leads to the social wealth mainly used to maintain people's food and clothing needs, while the investment in education and medical care is reduced, which leads to the decline of the education and medical care that people should enjoy, and ultimately will inevitably affect people's health and population quality. 3. The increasing social unrest and overpopulation make the labor force population exceed the needs of economic development, which makes it difficult to find employment and the number of unemployed people increase. At the same time, the high population density has created favorable conditions for the epidemic of infectious diseases. 4. The resources and space that aggravate environmental pollution and destroy the earth are limited, the population growth rate is too fast, the demand and destruction of human nature will continue to increase, the living space of human beings is shrinking and the living environment is deteriorating. In fact, environmental pollution not only affects human health, but also affects human sustainable development. (2) A healthy demographic structure mainly refers to the sex, age, marriage, occupation and culture of the population. Among them, age and gender structure are most closely related to health. 1. The age structure of the population refers to the proportion of each age group in the total population. The focus of population evaluation is the elderly population and children's population, which belongs to the non-working population who can't produce material resources. Its material consumption needs to be borne by the population of 15 ~ 64 age group. There are great differences in the ratio of old people to children in different countries. Developed countries bear a large proportion of the elderly population, while developing countries mainly bear the burden of children. The overall burden coefficient of developing countries is higher than that of developed countries. Age structure is closely related to the distribution of diseases. The prevalence of diseases among the elderly population is high, and the consumption of health resources is high. With the development of society towards an aging population, the prevalence of senile diseases has increased, which has formed a heavy burden on social medical and health undertakings. The United Nations stipulates that the population aged 60 and above exceeds 10% of the total population, or the population aged 65 and above exceeds 7% of the total population as an elderly society. According to the World Bank's forecast, in 2030, the global population aged 60 and above will be three times that of 1990, reaching1400 million, of which 80% will come from developing countries. 2. Population gender structure refers to the proportion of male population and female population in the total population respectively. The balance of sex ratio is one of the basic factors of social stability, and the imbalance of sex ratio is one of the root causes of social problems. From the analysis of the characteristics of human biology, the sex ratio of the population can maintain a natural balance. However, due to the influence of traditional values, war, social production needs, improper medical and health care measures and other reasons, there will be an imbalance in the sex ratio. (3) Population quality and healthy population quality refer to the conditions and abilities that human beings have to understand and transform the world, including human physical quality, ideological, scientific, cultural and technical quality and moral quality. The influence of population quality on health is mainly manifested in the following three aspects: 1. Physical fitness is the performance of the overall improvement of population health level. The physical quality of the population depends on both congenital and acquired aspects. The innate quality of the human body is inherited, and the acquired conditions are more important, including nutrition, education and medical conditions. Physical quality is the basis of population quality, which is manifested as the overall level of population health. 2. Scientific and cultural quality is the basis of improving people's health. Scientific and cultural quality refers to people's cultural level and rational ability formed in their own socialization, life activities and social practice. Including labor skills, education level, ability to invent and create, and ability to analyze and solve practical problems. It is mainly measured by the proportion of individuals with better formal education in society. Improving the scientific and cultural quality of the population is conducive to economic development and social progress, thus promoting health. Moral quality is an indispensable factor to improve people's health. Moral quality refers to certain world outlook, outlook on life and values formed by people in social activities, including political thoughts, spiritual beliefs, psychological conditions and behavior patterns. People's moral quality affects people's social behavior. Improving ideological and moral quality is conducive to forming a good interpersonal network of mutual assistance and cooperation, improving social cohesion and promoting the all-round development of health education.