Abstract: Experiment was conducted to investigate the residual dynamic of chlorpyrifos of ‘Gala’ apple’s fruit, leaf and soil in orchard by GC-TSD. The results showed that the pesticide residues was greatest in peel; chlorpyrifos half life of apple was 24.50d at the recommended concentration and times, the limit of determination was 0.012mg/kg; pesticide residue was related to concentration and times, there was a negative exponential function in dissolution process in the interval; the rate of residual dynamic of chlorpyrifos was leaf>aplle>soil, ultimately pesticide residue was aplle>soil>leaf.