The utility model discloses a front deck modular assembly structure, characterized by in the space of bounding wall X to the front portion, establish an installation support assembly before A00 levelplantago under -deck, installation support assembly have with the assembly locating hole of automobile body installation to prolong Y to being equipped with a plurality of layers of installation department, a plurality of layers of installation department are including the machine controller installation department, vacuum pump and the normal electric battery installation department that are located the bottom, be located the machine that charges, the junction box installation department of machine controller installation department top, still be equipped with pencil buckle mounting hole and pencil buckle hole on the installation support assembly. Through whole turning mold massing assembly, realize the promotion of throughput rate, through partial shipment under the line in order to reachthe process that reduces the assembly station, simplification automobile body and light -weighted requirement have been reached, and play the energy -absorbing purpose that contracts of bursting, reduce passenger cabin living space's invasion volume.