The utility model particularly relates to a structure is assembled in prefabrication of subway station platform board, its characterized in that: prefabricated assemble the structure and constitute byplatform board prefabricated component and bottom plate, set up shallow beam and longeron on the bottom plate, one side of platform board prefabricated component's upper component support in on the longeron, be provided with pre -embedded sleeve on the shallow beam, platform board prefabricated component have with pre -embedded sleeve's cylinder hole size, the bolt of the identical adaptation ofshape, platform board prefabricated component's bottom with pass through between the shallow beam the bolt cartridge in constitute among the pre -embedded sleeve and connect, the bolt with constitutea body structure through deposit concrete between the pre -embedded sleeve. The utility model has the advantages of: the construction cycle is reduced, the prefabricated overall structure atress of assembling is good, and platform board prefabricated component's structure is convenient for transport.