The utility model relates to a photovoltaic power plant wireless long -distance data transmission system, this system adopt tree -like distribution to build up, including wireless terminal equipment,concentrator and master station, the department in photovoltaic array is arranged to wireless terminal equipment, sets up one with the photovoltaic array one -to -one master station connects an at least concentrator, one an at least wireless terminal equipment is connected to the concentrator, adopt loRa wireless technology exchange of data between wireless terminal equipment and the concentrator,adopt GPRS technique exchange of data between concentrator and the monitoring main website. Compared with the prior art, the utility model has the advantages of low cost, low -power consumption, anti-interference ability are good, avoid the monitoring of photovoltaic power plant tradition to adopt big, the shortcomings such as the circuit energy consumption is many, error detection difficulty ofwire mode investment, improved the utilization ratio of the photovoltaic energy.