Abstract: The pot experiment and field experiment were conducted to study the different contents of dibutyl phthalate(DBP)and ethylhexyl phthalate(DEHP)in soil and plants during soybean growth periods with different residual amount of mulching plastic film(CK,1-fold,3-fold).According to the experiment,the contents of DBP and DEHP of soil and plants in high(3-fold) residual mulching film samples were higher than in low(1-fold) and the difference is significant.The contents of phthalic acid esters in soil and plants were increased during the growth period both in 1-fold,3-flod residual amount of mulching plastic film.Contents of DBP were 0.02 mg·kg^-1~0.47 mg·kg^-1 and contents of DEHP were 0.25 mg·kg^-1~6.13 mg·kg^-1 in soil in the growth period.Contents of DBP in plants were 0.19 mg·kg^-1~0.90 mg·kg^-1 and the DEHP was not discovered in the plants in the growth period.Similar conclusion was abtained through the pot experiment and field experiment.