Abstract: The field experiments and systematic investigation were made to study the effects of intercropping of cabbage and garlic on major pests and arthropod community in spring cabbage fields. The results showed that the intercropping of cabbage and garlic was able to reduce the degree of occurrence of major pests, Pieris rapae and Lipaphis erqsimi, raise the diversity and the ratio of natural enemies to pests of arthropod community, and was helpful to improve the community stability and reinforce the control of natural enemies on pests in spring cabbage fields. The average population density of major pests, Pieris rapae and Lipaphis erqsimi was reduced by 48.9% and 35.6% respectively, and the average diversity index and the ratio of natural enemies to pests of arthropod community rised by 17.9% and 61.8% respectively in intercropping field of 1 line cabbage and 1 line garlic as compared with those in cabbage monoculture field. Therefore, the intercropping of cabbage and garlic was helpful to reduce the pressure of cabbage pests caused by other control methods, including using insecticides, and improve the effects of provention and treatment and comprehensive benefit.