The invention discloses an on-site concrete hollow floor construction method of LPM light filling embodies. The construction method comprises the steps that a plate bottom formwork is erected, plate bottoms and hidden rib beam steel bar binding cushion blocks are installed, anti-floating drilling is conducted; and plate bottoms and hidden rib beam steel bars are bound, and a specially-assigned person is dispatched to punch holes in the bottom plate template according to the anti-floating distribution diagram, install water and electric pipelines, hoist LPM light filling pieces, place the filling pieces, bind plate surface reinforcing steel bars, reinforce anti-floating iron wires of the filling pieces, pour concrete, maintain, demold and the like. The method is simple in process, convenient to construct and easy to operate; by the adoption of the technology in a proper structure, the engineering quality is guaranteed, and meanwhile the beneficial effects of being small in concrete consumption, large in space, low in structural self-weight, small in earthquake acting force, good in structural heat insulation and sound insulation performance, capable of shortening the construction period and the like are achieved.