Abstract: The current method is usually used to evaluate the balance of pumping units. Because the clamp ammeter can not judge the direction of the current, the method will appear the phenomenon of false balance, that is, misjudging the pumping units as balanced state. The power balance method can not be disturbed by the current direction, but the measurement is more complicated than the current method. In order to faciltate the field application of power method to judge the balance of pumping wells, a power method balance an- alyzer for pumping wells was developed. The instrument can conveniently measure the power curve, calculate and analyze the balance degree, and put forward suggestions for balancing adjustment. The balance condition of the pumping unit well is tested by the balance analyzer and compared with the synchronous test result of the current method. The power method can clearly reflect the balance change and calculate the true balance degree more accurately than the current method. The unnecessary equipment loss caused by the unbalance of the pumping unit can be avoided. Power consumption increases, equipment safety hazards and other issues.