Effect of three types of herbicides on seed germination of maize variety Zhengdan 958 was investigat-ed in the paper. The results showed that when the seeds were soaked in the herbicides, seed germination potentialand germination percentage were not affected by Acetochlor, but inhibited significantly by atrazine and 2,4-D butyl-ate. Seed germination percentage was reduced by 13% and 27% by atrazine applied at normal and high concentra-tion, respectively, and was reduced by 44% and 91% by 2,4-D butylate at normal and high concentration, respec-tively. It was concluded that when contacted with the seed, 2,4-D butylate restrained maize seed germination seri-ously. Its concentration should be strictly controlled especially if it is rainy around the sowing time.