Quick start-stop device for high-pressure compressed air emergency diesel engine

The utility model provides a quick start-stop device for a high-pressure compressed air emergency diesel engine. The quick start-stop device comprises a high-pressure oil-gas separator, a high-pressure gas storage tank and a high-pressure step-down valve which are sequentially connected through a main pipeline, the main pipeline is connected with a first diesel engine through a fourth high-pressure switch valve, and the main pipeline is connected with a second diesel engine through a standby pipeline. According to the utility model, the high-pressure gas storage tank is used for storing gas, and the high-pressure reducing valve is used for reducing pressure, so that the marine diesel engine can be started and stopped repeatedly; oil and gas are separated through the high-pressure oil-gas separation device, damage to pipelines, valve sets, a diesel engine and the like caused by oil and water invasion is prevented, check valves and high-pressure switch valves are installed at some important positions of the dev