Combined back laying arrangement ship

The combined retreating and laying boat is a stable and efficient combined laying boat used to lay shore-protection ranging unit. Combine two decked transportation boats or multiple floating boxes into the boat hull, operating slide which is controlled by a hoister is clipped in the middle, laying operating platform which is connected with steel-frame structure is fixed on the back of the boat. The utility model is fixed with equipments of a hoisting axle and a clipping beam to carry out laying by steps; the boat can also be fixed with equipments of filling machine, generator, hoister and diving machine, etc. Compared with laying boat whose operating slide is hinged on the fore, this kind of laying boat adds width of operating slide, promotes efficiency of laying work, reduces quantity of laying connection, it can also reduce the length of laying boat, lessen the influence to river shipping that laying operation brings with.