The utility model relates to an assembled floor structure module, it includes hollow steel truss, prefabricated local coincide floor and little expansion concrete, wherein, the upper surface of hollow steel truss is equipped with a plurality of shear bolt nail, prefabricated local coincide floor supports on the hollow steel truss, and it has a plurality of through -holes to link up on it, shear bolt nail inserts in the through -hole of prefabricated local coincide floor, little expansion concrete fills in the through -hole to with the shear bolt nail landfill. The utility model discloses has avoided the environmental challenge that formwork concreting floor brought in the steel construction processing factory, and concrete floor and hollow steel truss detachable is prefabricated and the transportation, has reduced the hauled weight, can guarantee precast floor plank's wholeness simultaneously through effective structure, be one kind comparatively convenient, green's fabricated construction technology.