The invention relates to a feedback type energy-saving stone crusher and an ore stone crushing method, which belong to the field of smashing equipment. The feedback type energy-saving stone crusher ischaracterized by comprising a conveyor (3), a broken stone clamping and impacting device (1) located on one side of the conveyor (3), and a detection head (9) arranged on a feeding end of the conveyor (3), wherein a plurality of punches arranged in a radial shape are arranged on the broken stone clamping and impacting device (1) and the detection head (9); and an electromagnetic driver and a sensor (104) controlled independently are arranged on each punch. According to the feedback type energy-saving stone crusher and the ore stone crushing method provided by the invention, a stone crushing mode and a structure of a traditional stone crusher are changed; the detection head is firstly utilized for preliminarily detecting crack conditions of stones in transit, and feeding back to the follow-up broken stone clamping and impacting device, so that the stones can be specifically vibrated and impacted; and during an impacting process, voice and vibration fed back by the stones to the punchesare acquired, and the stones needing to be impacted is specifically vibrated and impacted, so that the energy consumption can be reduced, and meanwhile, the stone crushing efficiency is improved.