Cast-in-situ bridge formwork support system device and bridge cast-in-situ construction method

The invention provides a cast-in-situ bridge formwork support system device and a bridge cast-in-situ construction method. The device comprises at least two slip mechanisms, all-round scaffold connecting structures and groove track structures, the slip mechanisms move on the groove track structures, two adjacent slip mechanisms are connected through the all-round scaffold connecting structures, and all-round scaffolds are fixed onto the slip mechanisms and driven by the slip mechanisms to move along the groove track structures. By the aid of manpower or tools such as a hoister, the all-round scaffolds are rapidly and integrally migrated to a next construction section or specific position, slip directions can be adjusted at any time in the process, and the cumbersome procedures of assembling and disassembling supports are omitted. Compared with a traditional bridge construction method, the method is more convenient in construction, construction period is saved, labor input can be reduced, the cumbersome proced