The invention provides a comprehensive assessment method for a photovoltaic power station inverter. By means of data analysis and processing of the inverter fault rate X2, the inverter efficiency X3, the inverter electricity generation converting ability X4 and the fault maintenance rate X5, a comprehensive assessment value of the inverter is derived, the expression formula is Y=-X2+X3+X4-X5, as the inverter fault rate and the fault maintenance rate are negative factors for assessing the inverter, the smaller the inverter fault rate X2 and the fault maintenance rate X5 are, the larger -X2 and -X5 are, and the higher the inverter electricity converting ability X4 is and the larger the value of the inverter efficiency X3 is, the better the inverter is. According to the assessment method, the inverter is assessed comprehensively from multiple perspectives, the guidance advice is provided for a photovoltaic power station to select the optimal inverter, and then the contribution is made to improvement of electricity generating efficiency of the photovoltaic power station.