It’s a special crane for bridge construction; the main frame is composed of hoisting mechanism transverse mechanism, lengthways travelling mechanismand principa I steel supporting member. The beam launching and install of bridge can be operated in various complicated a trocious geography by launching equipment .There is a advanced efficient and high cost performance bridge construction equipment, which also could developed farther ahead. It extensive used in cross-the-sea, cross-the-river, cross-the-valley, bridge and viaduct of the city. As well as appliance to connect tunnel of upland for traversing tunnel ahead project.