The invention provides a droop based master-slave like control method in allusion to a photovoltaic parallel microgrid structure, which is used for solving a problem of the maximum power output and voltage/frequency stability in grid connection of a photovoltaic parallel microgrid. The microgrid comprises a plurality of photovoltaic power generation units and a common bus, wherein each photovoltaic power generation unit is a modular unit formed by a photovoltaic panel, a boost DC/DC converter and a DC/AC inverter. The control strategy proposed by the invention simultaneously realizes voltage/frequency stable running of the photovoltaic parallel system and MPPT output of the photovoltaic units. The problem that traditional droop control cannot realize MPPT output of the photovoltaic units is improved, and the power output efficiency of the parallel photovoltaic system is improved. Compared with the traditional droop control method, the control method provided by the invention can realize the maximum power utilization of the photovoltaic units and improves the utilization rate of renewable energy; and compared with the traditional master-slave control method, the control method provided by the invention can operate without communication, reduces the communication cost of the system and improves the reliability of the system.