Provided in the present application are a magnetic resonance imaging system, a positioning method of an implant therefor, and a non-transitory computer-readable storage medium. The positioning method of the implant for the magnetic resonance imaging system includes: executing a first scanning sequence to obtain original image data and reconstructing an edge image of the implant on the basis of the original image data. The first scanning sequence includes: a radio frequency excitation pulse and a first layer selection gradient pulse corresponding to the radio frequency excitation pulse, the frequency of the radio frequency excitation pulse having a preset offset relative to a center frequency; and a radio frequency refocusing pulse and a second layer selection gradient pulse corresponding to the radio frequency refocusing pulse, the direction of the second layer selection gradient pulse being opposite to the direction of the first layer selection gradient pulse.