The active tracking control strategy calculates the position of the sun in the sky and controls the orientation of the photovoltaic array. This kind of active photovoltaic automatic tracking system can be better applied to the environment with frost, snow and dust, and can also work reliably in unattended photovoltaic power stations. It can greatly reduce the energy consumption of the tracking system. A properly designed photovoltaic tracking system can increase the efficiency of the entire system by 40%, while the power consumption of the own motor is only 20kwh a year, and it is cheap and easy to install.