Automatic photovoltaic tracking control system

Disclosed is an automatic photovoltaic tracking control system. A GPS module (2) of the automatic photovoltaic tracking control system is connected with a CPU module (6) of the automatic photovoltaic tracking control system in a communication mode, and the GPS module (2) transmits the longitude and latitude information of the place where the GPS module is located and the time information of the place where the GPS module is located to the CPU module (6). A sensor module (1) which is installed at the position of the edge of the top face of a tracking support (5) transmits a collected sunlight strength signal to the CUP module (6) after the sunlight strength signal is filtered through a signal filtering module (3). A 485 communication module (4) is connected with the CPU module (6) in a communication mode. A tracking output conversion module (8) converts logic signals output by the CPU module (6) into rotation signals which drive an upper pitch angle rotary motor of the tracking support (5) and a horizontal rotary motor of the tracking support (5). According to the automatic photovoltaic tracking control system, the current sunlight strength signal is obtained from the sensor module, the current sun position is obtained through calculation, the position is compared with a sun standard position stored in the system at the current moment and a result is output to a driving motor of the tracking support (5).