Abstract: Along with improvement of people′s living standard，environmental protection and health consciousness are constantly increased，food safety problem are received more and more attention and concern from all walks of life.Aimed at problems of pathogenic bacteria in the soil，root knot nematodes and soil borne diseases and insect pests which were brought by continuous farming of fixed field in facilities greenhouse in Tianjin city，a variety of soil disinfection technologies were studied.Most suitable soil disinfection technology which was applied to modern agriculture in Tianjin was chosen.