The utility model discloses a built on stilts floor of assembled and assembled space separation system should support, set up the support chassis who supports the top on the floor and set up the prefabricated floor in the support chassis top including the floor that sets up on structural floor slab in built on stilts floor, support chassis is the latticed frame construction who is formed by first member and second member interconnect, and wherein first member passes through the recess joggle with the second member and is connected, and recess joggle department is provided with the connecting hole, the connecting hole is passed to adjusting bolt's on the floor is supported lower part, and connecting piece and prefabricated floor connected are passed through to its top. The utility model provides a built on stilts floor of assembled and assembled space separation system, its is rational in infrastructure, and it is convenient to be under construction, realize pipeline for building and building structure's separation, improved the modifiability of house, reduce the repeated construction of house, reduced the cost of maintenance of house, improve the sustainability of house, accorded with assembly type structure's demand for development.