The utility model provides a communication networking system and a photovoltaic tracking control main system. The communication networking system is applied to the photovoltaic tracking control main system. The communication networking system comprises a background monitoring device, a server, an Ethernet link, a looped network switch, a multi-core armor optical cable link, an inverter chamber, aphotovoltaic module array and a wind speed sensor, the background monitoring device is used for monitoring the working state of the photovoltaic tracking control main system; the server is used for controlling the communication networking system through the background monitoring device; the Ethernet link is used for providing an interactive physical communication link for the background monitoringdevice, the server and the looped network switch; the looped network switch is used for switching communication information between the server and the inverter chamber; the inverter chamber is used for converting direct-current electric energy into alternating-current electric energy; the photovoltaic module array is used for converting solar energy into electric energy; according to the utilitymodel, the working stability of photovoltaic communication networking is improved, and the energy conversion efficiency of a photovoltaic power station is improved.