Electric actuators have been widely used in industrial automation production process,in the thermal power plant boiler is mainly used to control and regulate the production and operation of the media and key parameters of the equipment,such as:pressure,temperature,flow rate,liquid level and so on.Based on this,a brief description of the structure,working principle and characteristics of PS electric actuators,mainly on the PS electric actuators in the thermal power plant boiler application of some of the problems,was analysed,through the adoption of appropriate treatment,and put forward the use of some of the precautions,achieved good results in the application of the boiler's safe and stable operation plays a strong role in safeguarding.