Abstract: Based on the various problems that actually exist during the operation of the DC pitch motor of a certain wind farm wind turbine generator unit, and in response to the existing problems, summarize the maintenance and specific measures of the DC pitch motor, effectively carry out the maintenance and upkeep of the DC pitch motor, effectively reduce faults caused by inadequate maintenance of the electric machine, extend the service life of the pitch motor, and improve the operational availability of the wind turbine generator unit.