Abstract: According to the power unbalance problems of head and tail electric motors during operation process of scraper conveyor, a frequency conversion speed regulation method was applied to the torque control of electric motor.In consideration of factors affected to power balance of electric motors applied to scraper conveyo r, according to the minimum tension method applied to set up load torque ratio, based on rotary speed of electric motor regulated with load torque, the power balance of electric motors was realized.The AMEsim was applied to establish the simulation model and to set up rational simulation parameters.The simulation was conducted on t he control system, the control effect of system under the condition of load fluctuation was analyzed, the rationality of control system was verified and the power balance control was realized.