The utility model provides a high vacuum insulation calorimeter relates to an oxygen bomb calorimeter technical field. The utility model discloses an including urceolus, inner tube and oxygen bomb, wherein, the inner tube is the stainless steel vacuum cup, and the stainless steel vacuum cup is vacuum sandwich structure, and the inner tube top is provided with the upper cover, is provided with seal structure between upper cover and the inner tube. The utility model discloses a heat exchange between isolated inner tube in vacuum layer and the external environment really realizes the adiabatci condition, the precision of assurance test data.