Microwave drying sterilization equipment is the use of the electromagnetic field of the thermal effect and biological effect of the **** the same role in the results. Microwave thermal effect on bacteria is to make protein changes, so that bacteria lose nutrition, reproduction and survival conditions and death. Microwave biological effect on bacteria is the microwave electric field to change the cell membrane section of the potential distribution, affecting the concentration of electrons and ions around the cell membrane, thereby changing the permeability of the cell membrane, the bacteria are therefore malnourished, can not be normal metabolism, the cell structure dysfunction, growth and development is inhibited and death. In addition, microwave can make bacteria normal growth and stable genetic reproduction of nucleic acid RNA and deoxyribonucleic acid DNA, is by a number of hydrogen bond relaxation, fracture and reorganization, thus inducing genetic mutations, or chromosomal aberrations or even breaks.