The invention relates to a comprehensive indoor solar photo-thermal environment simulator for pavements. The simulator solves the problems of low automation degree and integration degree of an existing indoor solar photo-thermal temperature control simulator. A spraying device of the simulator is used for simulating the raining state to enable the bottom of a thermal-insulation cabinet to be uniformly sprayed; a light source can be fixed to the top center of the thermal-insulation cabinet through an adjustable-length suspension wire; an air humidification system is used for adjusting air humidity inside the thermal-insulation cabinet; an air humidity sensor and an air temperature sensor are used for detecting air humidity and air temperature inside the thermal-insulation cabinet respectively; and two rut test piece grooves are symmetrically positioned at the bottom of the thermal-insulation cabinet, two fans are fixed onto one side wall of the thermal-insulation cabinet and in one-to-one correspondence to the two rut test piece grooves, and a drain hole is positioned at the bottom center of each rut test piece groove. The comprehensive indoor solar photo-thermal environment simulator for the pavements undoubtedly plays a promoting role in study on temperature-related damages of asphalt concrete pavements, reduction of urban heat island effect and the like.