Hoisting system and hoisting method for crown block over-limit equipment in limited space

The invention relates to the technical field of equipment hoisting, in particular to a hoisting system and a hoisting method for crown block overrun equipment in a limited space, comprising an original crown block system, a hoisting mechanism slidably mounted on a trolley track and a reinforcing mechanism arranged between a crown block walking beam and an equipment foundation at an interval; the hoisting mechanism comprises a hoisting frame installed on the trolley track in a sliding mode, the hoisting frame is of a rectangular structure, and hoisting chain blocks are installed at the four corners of the hoisting frame and used for controlling the hoisting height of equipment. A chain block is connected between the limiting stop block and the hoisting frame, and a sliding chain block is arranged on the chain block; the reinforcing mechanism comprises a rectangular frame, and a base plate is filled between the rectangular frame and the crown block walking beam; the plant roof does not need to be dismantled, th