Miniature high-pressure in-situ comprehensive experimental device for gas hydrate

The invention discloses a miniature high-pressure in-situ comprehensive experimental device for a gas hydrate. The miniature high-pressure in-situ comprehensive experimental device comprises an upperbase, a lower pedestal, pressure sensors, a cooling pool, a jack, a lower base and upright columns, wherein the upper base is provided with a sapphire optical window; the lower pedestal is provided with a sample cavity and a reference cavity which are provided with thermocouples; the pressure sensors are mounted at the bottom of the lower pedestal; the cooling pool is located at the bottom of thelower pedestal and forms a holding space with the lower pedestal together; the pressure sensors are arranged in the holding space; the jack is located at the lower part of the cooling pool and is in contact with the bottom of the cooling pool; the lower base is arranged at the lower part of the jack and is in contact with the bottom of the jack; the upright columns are connected between the upperbase and the lower base; a