The invention discloses a butterfly valve control device for a power plant. The butterfly valve control device comprises a driving motor. A driving rod is arranged on the driving motor, a radiating cover sleeves the outer surface of the driving motor, hollow spiral pipelines are distributed inside the radiating cover, a water inlet and a water outlet are formed in the radiating cover, and a plurality of radiating flanges are further arranged on the outer surface of the radiating cover and are distributed in a central symmetry manner around the water inlet. The butterfly valve control device for the power plant has the advantages that butterfly valves can be driven by the motor to run, the radiating cover sleeves the outer surface of the motor to timely dissipate heat generated by the motor, the radiating cover can be filled with cooling water, accordingly, heat in the radiating cover can be quickly taken away, the radiating flanges arranged on the outer surface of the radiating cover are favorable for dissipating the heat, accordingly, overheating of the motor can be prevented, and the service life of the butterfly valve control device can be prolonged.