The invention provides a high-precision rotating speed measurement module. The high-precision rotating speed measurement module comprises a weak magnetic measurement circuit; the weak magnetic measurement circuit comprises a magnetoresistive sensor and a hysteresis comparator; the input end of the magnetoresistive sensor is electrically connected with a driver and an oscillator; the output end ofthe magnetoresistive sensor is electrically connected with a multi-stage amplifier; the output end of the multi-stage amplifier is electrically connected with a phase-sensitive regulator; the output end of the phase-sensitive regulator is electrically connected with a PID network; the input end of the hysteresis comparator is electrically connected with the output end of the PID network; the output end of the hysteresis comparator is electrically connected with an oscilloscope; the hysteresis comparator is used for outputting continuous sine wave voltage signals so as to obtain pulse square wave voltage signals; and the oscilloscope is used for displaying and recording the pulse square wave voltage signals. The high-precision rotating speed measurement module has the advantages of small size, low temperature drift and high temperature resistance, and is suitable for the fields of high-temperature petroleum logging, missiles, ships, medical equipment, automotive electronics and the like.