The invention discloses an electrical power saver of an oil extraction motor, comprising a voltage transformation synchronous detection module for detecting a three phase power supply supply voltage of an oil extraction motor, a voltage transformer used for converting a voltage signal output by the voltage transformation synchronous detection module into a voltage signal acceptable to a single-chip microcomputer, a first signal amplifier, a first filter, a first analog to digital conversion circuit, a current detection model for detecting the input current of the power supply end of the oil extraction motor, a current transformer used for converting a current signal output by the current detection module into a current signal acceptable to the single-chip microcomputer, a second signal amplifier, a second filter, and a second analog to digital conversion circuit. The single-chip microcomputer receives digital signal output by the first analog to digital conversion circuit and the second analog to digital conversion circuit, and inputs pulse signal to IGBT switch circuit through a pulse triggering module, and thereby the phase sequence of the three phase power supply can be adjusted. The electrical power saver of an oil extraction motor is simple in structure, convenient to use, good in power-saving effect, and convenient for popularization and usage.