Disclosed is an application of a steady-state voltage distribution model of a distributed photovoltaic multipoint access distribution network. The application comprises the following steps of: expressing the load of each node on a feeder line by adopting a constant current static model, converting all line impedances into system voltage levels, and then performing corresponding calculation and analysis; deducing a function relationship between the steady-state voltage distribution of a grid after multipoint access of a distributed photovoltaic power supply and the electrical distance according to uniform distribution, increasing distribution and decreasing distribution of the loads along the feeder line respectively; selecting a reference value, converting the grid parameter into a per-unit value, and then performing corresponding calculation and analysis; and based on an actual power application scene, analyzing the influence of distributed photovoltaic capacity of multi-point access, operation mode, load of the line, impedances of the power supply line and selection of a transformer tap on the voltage distribution on the feeder line. The method for studying the influence of distributed photovoltaic multipoint access to the grid on the steady-state voltage distribution of the grid is strong in practical value and wide in applicability, and improves the power safety.