The invention provides an assembled integral-type prestress steel-concrete combination beam type bridge. The assembled integral-type prestress steel-concrete combination beam type bridge comprises prestress steel beams, prefabricated support prestress reinforced concrete slabs, prefabricated midspan reinforced concrete slabs, pier columns, joists and a pavement layer. Cracking of concrete slabs in a hogging moment area of the steel-concrete combination beam type bridge can be effectively controlled through the adopted prefabricated support prestress reinforced concrete slabs, mounting is simple, and construction is convenient. Machining of combination rigid shearing resistance connecting pieces is easy, and the connection performance of the steel beams and the prefabricated concrete slabs can be effectively guaranteed. According to the assembled integral-type prestress steel-concrete combination beam type bridge, the construction technology of a traditional steel-concrete combination beam type bridge is improved, the assembly degree of a bridge deck structure is improved, and the force-bearing performance and the connection structure of the assembled integral-type prestress steel-concrete combination beam type bridge are optimized; and the force-bearing performance is reasonable, durability is excellent, construction is convenient and fast, and remarkable advantages are achieved compared with the traditional steel-concrete beam type bridge.