The invention relates to the field of speed regulation of a power station fan and a water pump unit, in particular to a high-efficiency steam-electricity hybrid power speed regulation unit. The unit includes a steam turbine, a gear box, a synchronous automatic clutch, a motor, a full-power frequency converter, a load, a planetary hydraulic speed regulation/constant speed device, and a planetary variable frequency speed regulation/constant speed device. Through the different arrangements and applications of the device, the hybrid power speed regulation driving unit is realized, the unit integrates the advantages of the steam-driving and electricity-driving parties, has the characteristics of being energy-saving, efficient, high in reliability, saving in investment, and is particularly suitable for actual conditions of peak shaving and future deep peak shaving operation of a current power station.