The invention relates to a speed limiter safety clamp lifting mechanism for saving elevator hoistway space. A speed limiter is arranged on a car assembly, and the bottom of the speed limiter is connected with a speed limiter mounting base; a rotating shaft is fixed on a car frame upper beam; the speed limiter mounting base and the rotating shaft form a rotating shaft moving pair; the speed limiter can rotate around the rotating shaft; one end of a safety clamp pull rod is connected with the speed limiter, and the other end is connected with a safety clamp linkage mechanism connecting rod; the safety clamp linkage mechanism connecting rod is connected with safety clamps; and one end of a speed limiter steel wire rope is fixed at the top of a hoistway, and the other end is guided to the bottom of the elevator hoistway by a guide device, connected with tensioning device arranged at the bottom of the elevator hoistway and tensioned by the tensioning device. The mechanism is simple in structure and reliable in functions, can greatly save the hoistway space compared with a traditional speed limiter steel wire rope rotating around a speed limiter rope wheel and expansion tensioning wheel, in particular, is suitable for an elevator with narrow hoistway space, or even a hoistway mounting elevator incapable of being installed due to space limit.