Abstract: Through field comparative experiments on different seed dressing agents, including 11% oxazole·sterilized oxazole（Heyue）, oberi, 25 g/L suspension seed coating agent silex, imidacloprid 600 g/l suspension seed coating agent Gaoqiao, and likxiu suspension seed coating agent, the results showed that all seed dressing agents are safe for wheat. The control effect of seed coating agent on soil borne diseases of wheat can be seen: Heyue 0.65 mL/kg, the average disease plant rate is 9.77%, and the average relative control effect is 90.23%. Heyue 0.75 mL/kg, the average infected plant rate is 7.3%, and the average relative control effect is92.7%. The average disease plant rate of Heyue + Gaoqiao is 4.13%, and the average relative control effect is 95.87%. The average infected plant rate of kuras was 6.8%, and the average relative control effect is 93.2%. The average disease plant rate of silex was6.17%, and the average relative control effect was 93.83%. The average disease plant rate of likxiu is 10.36%, and the average relative control effect is 89.64%. The average disease plant rate of oberi is 2.06%, and the average relative control effect is 97.94%.