Abstract: A method for determination of chlorpyrifos in vegetables was extablished by recovery experiment. The results indicated that, oscillation the samples 30 min, using single acetone as the eluent, filling 1g silica gel in the chromatographical columniation and taking the leaching liquor after 6 minutes can remove the factors that interfering the chromatogaphic peac as well as insure a preferable recovery of 90%~20%。