The invention provides a method for maintaining stable operation of a photovoltaic power station. The method includes the steps of detecting the number of series and parallel connections of solar cellsubmodules; detecting the operating temperature of a solar cell panel, performing temperature trend judgment, and predicting the temperature trend in a period of time in the future according to illumination factors, calculating a voltage of and voltage output by the solar cell submodules according to future illumination and temperature, and calculating a voltage output to a power grid; calculatea maximum temperature threshold that the solar cell panel can withstand, and comparing whether the current temperature is greater than the maximum temperature threshold for running; if yes, adjustingthe output power of the solar cell panel; and if not, controlling a maximum output power control module to perform maximum output power control. According to the method for maintaining stable operation of the photovoltaic power station, the output power of the photovoltaic power station can be controlled according to the temperature, the instability caused by the high temperature of the solar cellpanel is reduced, and the solar power station can run safely.