A high-pressure air source generating device comprises a main control system and a compression system which are connected with each other by a data bus, the main control system controls the compression system to start and stop according to the needed pressure, the high-pressure air source generating device is characterized in that the compression system comprises a compression motor, a primary compression device, a secondary compression device, a three-level compression device, a water-oil separator, a pressure stabilizing valve, a check valve, a gas filling valve, a gas filling joint, a pressure detector, a pressure release valve and an air storing tank. The high-pressure air source generating device has a simple structure and stable performance, and is an automatic control system designed and manufactured by self, is high in performance-price ratio, stable in air source pressure and large in flow rate, wherein the medium is common air.