The invention relates to the field of power grids, and particularly relates to an inverter parameter control method. In allusion to a characteristic that randomness in photovoltaic power generation output and load fluctuation in a microgrid results in dynamic changes in operation mode of the microgrid, output and load of a photovoltaic power generation system are described by using a dynamic probability model of a random variable, and thus a microgrid inverter parameter optimization method considering multiple operating modes of the system is researched. The inverter parameter control method takes the operation randomness and the operation mode diversity of the microgrid into consideration, and carries out optimization on parameters of a microgrid controller from an overall perspective based on dynamic probability characteristic root analysis.