Aiming at the problem of pump burning caused by the excessive temperature of the motor during the lifting process of the electric submersible pump in the low-yield well of the offshore oil field. This paper experimentally determines the motor pump burning time of low-yield wells, and analyzes the flow characteristics and heat transfer laws of downhole fluids in low-yield wells through the finite element simulation method, and proposes a reflux method for electric submersible pumps. The research results show that: under the condition of low oil well production, the fusing phenomenon begins in about 22 minutes, and the moving liquid level is located below the pump suction port, and the fluid carrying heat decreases, which will cause the pump to burn; the temperature can be A reduction of 130°C indicates that the reflux device has a strong feasibility; the fluid temperature at 10m above the pump is relatively stable, and the fluid is basically unchanged, so the return fluid supplement device can be shorted 10m or more above the pump; the size of the return channel is 3cm-4cm From time to time, the reflux is the largest, and the corresponding motor temperature is also the lowest among all sizes.