The invention relates to the technical field of compressor parts, in particular to a counterweight device for a lateral regulation type compressor piston. The counterweight device comprises a piston body, wherein the piston body is internally provided with a middle assembly through hole, a plurality of transverse counterweight holes are formed in the periphery of the middle assembly through hole of the piston body, and lead blocks used for weighing are arranged in the transverse counterweight holes. According to the counterweight device for the lateral regulation type compressor piston, the transverse counterweight holes with the built-in lead blocks and external thread adjusting rods are formed in the periphery of the middle assembly through hole of the piston body, and sealing covers with built-in transmission gear blocks sleeve openings in the outer sides of the transverse counterweight holes, internal transmission gears are meshed with the transmission gear blocks by extruding thesealing covers inwards, and then the sealing covers are rotated to horizontally move the built-in lead blocks, so that the mass of each column of pistons is balanced, the reciprocating inertia force is balanced, and the smooth operation of a compressor is guaranteed.