A method for detecting 34 pesticide residues in eatable silvan foods by SIM-GC-MS was developed, based on the modified QuEchERS (quick, easy, cheap, effective, rugged and safe) for sample preparation. The fortified recoveries of 34 pesticides have a range from 71.9% to 112.5% and the RSD( relative standard deviation) of 0.5%－18.5% in bamboo shoots, and with recoveries of 70.1%－122.8% and RSD of 1.7%－18.9% in mushroom. The method consumes about 1.5 to 2 h for a sample preparation, and its fortified recoveries, RSD are all according with the pesticide multi-residue’s demands.