The difficulty of the postgraduate entrance examination for big data majors can be regarded as moderate. Postgraduate entrance examination is a comprehensive and in-depth examination, which requires candidates to have solid professional knowledge and analytical ability. For the postgraduate entrance examination of big data, candidates need to have basic knowledge in mathematics, computer science, statistics and other related fields, and need to understand the theoretical and practical applications of big data technology, data mining, machine learning and other professional fields. The difficulty of postgraduate entrance examination also depends on the individual's learning ability, preparation time and subject foundation. If candidates have a good foundation in related fields, and can arrange their study time reasonably and make an effective preparation plan, it is feasible to deal with the difficulty of postgraduate entrance examination for big data majors.