Abstract: 【OBJECTIVE】In order to control weeds in field and quicken degradation of soil rudimental pesticide, it is very important to produce non-public farm products. 【METHOD】In the areas of rudimental pesticide used for a long time, we can make three steps that contained autumn- harvest and low- tillage for consecutive 2~3 years, early-low-tillage and late-sow in next spring-sow, or direct late-tillage-sow to study effects of weed controlIn the same time, we can measure the length and fresh weight of crop young-root to analyze the degradation effects of soil rudimental pesticide by these steps. 【RESULTS】 It was indicated: when Triflurex was used for a long time in cole field, soil rudimental pesticide can inhibit young-root growth of next-season highland barley, whose young-root shortened 3.0~3.1cm and whose fresh weight decreased 0.19~0.20g per individual plant compared with the control. When the mevinphos was utilized for a long time in highland barley field, the young-root of next-season cole shortened 1.9~2.0cm and fresh weight decreased 0.13~0.14g per individual plant compared with the control. Low-tillage in time after autumn-harvest showed that the weed seeds in the ground surface were harrowed into the tilth of 0~10cm. Early-low-tillage in spring-sow of the next year induced weed seeds of soil surface to germinate and come out ahead. After 10 days, tillage-sow can decrease about 40% weeds. Compared to the normal plough-row, direct late-tillage-row was postponed 10 days, and can decrease about 30% weeds. In the seedling period or later, rudimental weed seeds were handled with a hoe, which led to better cure and control effects and had more benefits to the young seedling growth and yield of the next-season crop.【CONCLUSION】in the areas of rudimental pesticide used for a long time, low-tillage for successive 2~3 years after autumn-harvest and weeds handling with a hoe in different tillage-sow period can control harm of weeds in crop field efficiently, and can not pollute soil and environment, furthermore, can quicken the degradation of soil rudimental pesticide.