The invention relates to the technical field of machines, in particular to a discrete physical device for dismounting a power battery module structure bottom plate. The discrete physical device comprises a machine table, table legs, a sliding groove, anti-skid stripes, a supporting frame, a first square rod, a first threaded rod, a driven belt wheel, a transmission belt, a drive belt wheel, an electric machine, an electric machine support, a sliding block, a limiting block, an electric push rod, a supporting plate, a cylinder, an electric screwdriver, a second square rod, a first opening, a second opening, blocks, rubber gaskets, connecting sheets, springs, racks, gears, motors, motor supports, a first clamp, a rubber anti-skid block, a power battery module, the power battery module bottomplate, power battery module installing screws, a second clamp, a second threaded rod, a clamping block, a rotation handle, a material storage box, a partition plate and threaded holes. Through meshing connection of the first threaded rod and the sliding block and power provided by the electric machine, the detached power battery module bottom plate and the power battery module installing screws can be effectively placed in the material storage box.