The invention belongs to the field of underground comprehensive pipe gallery engineering, and in particular relates to a multi-structure combined assembly pipe gallery with a superposed member and a construction method thereof. The assembled pipe gallery comprises solid core prefabricated inner walls arranged on cast-in-place floors, the solid core prefabricated inner walls are arranged at the twosides of the middles of the cast-in-place floors, the sides of the solid prefabricated inner walls are provided with diagonal braces, a prefabricated reinforced truss superposed roof is installed between the tops of the solid prefabricated inner walls at the two sides, the upper side of the prefabricated reinforced truss superposed roof is a cast-in-place roof; the cast-in-place pipe gallery comprises cast-in-place outer walls arranged at one sides of the cast-in-place floors, cast-in-place structure roofs are arranged between the cast-in-place outer walls and the solid prefabricated outer walls; a semi-assembled pipe gallery comprises cast-in-place outer walls arranged at the other sides of the cast-in-place floors, double-sided prefabricated sandwich outer wall plates are arranged outside the cast-in-place outer walls; the double-sided prefabricated sandwich outer wall plates are provided with diagonal braces, and prefabricated reinforced truss superposed roofs are installed between the double-sided prefabricated sandwich outer wall plates and the solid prefabricated inner walls.