A tank type high-pressure vacuum circuit breaker solves the problems that a structure integrally and solidly sealing a silicon rubber insulator with an arc extinguish chamber is complex in manufacturing process and incapable of allowing the arc extinguish chamber to be replaced independently, and the vacuum arc extinguish chamber directly mounted in high-pressure insulating gas bears high pressure. The tank type high-pressure vacuum circuit breaker is characterized in that a cavity between a vacuum arc extinguish chamber and a large insulating cylinder and a cavity between a small insulating cylinder and an operational insulating rod are communicated with each other to form a closed low-pressure gas compartment filled with 0-0.1MPa dried air or nitrogen, and a cavity between the large insulating cylinder and a tank and a cavity between the small insulating cylinder and the tank form a closed high-pressure gas compartment filled with 0.15-0.6MPa dried air or nitrogen. The tank type high-pressure vacuum circuit breaker has the advantages that the vacuum arc extinguish chamber is operated in the low-pressure gas compartment so as to be protected effectively, and the high-pressure gas compartment guarantees insulating performance of the circuit breaker, so that only the vacuum arc extinguish chamber needs to be replaced singly if the vacuum arc extinguish chamber fails.