Assembling tool for screws in narrow space of satellite

The invention relates to an assembling tool for screws in a narrow space of a satellite, and belongs to the technical field of satellite assembling. The assembling tool comprises a pressing handle, a main shaft rod piece, a force transmission barrel, a ring clamp hoop, a head spring claw, a ring clamp fixing nut, a ring clamp, a limiting nut and springs, wherein the pressing handle comprises a pressing piece and a pressing protection piece, and the pressing protection piece is fixedly connected with the pressing piece to form the pressing handle; the pressing piece penetrates into a positioning hole of the main shaft rod piece and is fixed through the limiting nut; the main shaft rod piece comprises a rotating handle and a main shaft, and one end of the main shaft penetrates into the rotating handle and is fixedly connected with the rotating handle; the force transmission barrel comprises a top barrel and a top head, and the top head is embedded into the top barrel and integrally arranged on the main shaft ro