fungicide of fossil origin (M1 water agent) as the material，the toxic effect of M1 on germination capacity of seeds and root growth of tomato，cucumber，pepper and control effect of M1 against tomato leaf mould were studied by using single factor and effect testing method.The results showed that M1 had no effect on germination capacity of seeds and root growth.And the phytotoxicity of M1 on the plants did not take place.Tomato leaf mould caused by Fulvia fulva had effectively been prevented by using M1 with field efficacy，which control effect was 78.32%.So the study laid the groundwork for further research and application of M1.