The utility model discloses a double -deck rectangle truss modularization platform system of saddle climbing type for the construction of assembly type structure structure, this system includes: at least two sets of lifting driving system, every lifting driving system of group include saddle, drive arrangement and seat in the plane frame, on the saddle is located to seat in the plane frame cover, on drive arrangement is fixed in the seat in the plane frame, connect to form whole lift platform through operation platform between adjacent lifting driving system's the seat in the plane frame, whole lift platform is double -deck work platform. The utility model provides a double -deck rectangle truss modularization platform system of saddle climbing type, not only simple structure, atress force transmission system are clear and definite, stability is good, moreover, can satisfy some needs and carry out the demand of being under construction simultaneously on upper and lower two planes, have improved prefabricated exterior wall's assembly efficiency greatly, satisfy requirement safe, high -efficient construction.