The invention discloses an intelligent adjusting device of an underground coal mine air window, and belongs to underground coal mine ventilating devices. The intelligent adjusting device of the underground coal mine air window comprises an air volume sensor, a window frame, a movable type window door, a sliding rod, an air cylinder, an air cylinder front cavity, an air cylinder back cavity, an air injection pipeline, a solenoid valve and a controller. The movable type window door is located inside the window frame, one side of the movable type window door is connected with one end of the air cylinder through the sliding rod, the two output ends of the solenoid valve are connected to the air cylinder front cavity and the air cylinder back cavity of the air cylinder respectively, and the output end of the air cylinder is connected with an air source through the air injection pipeline. The control end of the solenoid valve is connected with the output end of the controller. The air volume sensor is connected with the input end of the controller. The intelligent adjusting device has the advantages that the ventilating area of the air window can be intelligently adjusted according to actual required airflow of underworkings, the process is accurate and automatic, the ventilation requirement for roadway branches under the condition that the underground airflow is changed easily can be effectively met, and stable operation of a ventilating system is guaranteed.