In this paper, field trials showed that the mixture of acetochlor and pyrazosulfuron-ethy had remarkable control effect against weeds in rice field. The field trials were carride out during 1994 to 1996. The results showed that tank-mixing had a good formulation of herbicides in the control of annual weeds and perennial weeds, such as barngardgrassscirplls juncoides and sagittaria sagittifolial plant total control was 90%~95%. The cost is the lower than the mixture of butachlor and pyrazo-sulfuro-ethy.