Large pin shaft convenient installation system

The utility model discloses a large pin shaft convenient installation system which comprises a beam lug plate connected to one end of a beam body, a pin shaft connected into the beam lug plate in a penetrating mode, a pushing device connected to the beam lug plate on the side where the pin shaft penetrates, and a temporary operation platform device. The pushing device comprises a side bracket, a bottom bracket, an end baffle and a horizontal jack; the temporary operation platform device comprises an operation platform first side fence, an operation platform second side fence and a fence connecting rod. The side brackets, the bottom brackets and the end baffles are arranged in a combined mode, a mounting foundation is provided for the jack, the side brackets, the bottom brackets and the end baffles are fixedly connected to the beam lug plates, space is saved, and reserved holes formed in the side brackets can serve as lifting holes and mounting holes; through combined application of the horizontal jack and the