The invention discloses a leaching oscillation device for crop pesticide residues and a crop pesticide residue leaching method, and mainly relates to the field of plant protection work. The device comprises an oscillation bottle and a host, a main machine comprises a machine base, a rotating shaft is rotatably installed on the machine base, an overturning plate is fixed to the rotating shaft in acircumferential limiting mode, two rows of installation openings are formed in the overturning plate, the interiors of the installation openings are fixed to the oscillation bottles through rotating bearings, driven belt wheels are fixed to the rotating bearings, an installation shaft is rotatably connected to the overturning plate, a one-way bearing is installed on the installation shaft, the outer ring of the one-way bearing is sleeved with a driving pulley, driven bevel gears are mounted on the periphery of the outer end of the mounting shaft, a driving bevel gear is arranged at one end ofthe rotating shaft, the driven bevel gears are meshed with the driving bevel gear, and a transmission belt is wound on all the driven belt wheels and the driving belt wheel. The method has the beneficial effects that the scouring effect of the solvent on the surface of the sample is improved, the extraction effect is improved, and the adverse effect of the instability of extraction on subsequent detection data is reduced.