The invention discloses a manufacturing method of a novel vacuum heat preservation container and the manufactured vacuum heat preservation container thereof. The method includes the steps that firstly, the bottom of an outer shell protrudes from inside to outside to form a venting groove; secondly, a low-temperature sealing layer is welded to the inner wall of the venting groove, so that the venting groove and the low-temperature sealing layer are combined to constitute a composite layer; thirdly, a venting hole is formed in the composite layer. The venting hole is blocked by the low-temperature sealing layer from the interior of a container body, and the container body can be vacuumized when the container body is put straight, so that the air inside a heat preservation cavity can be completely exhausted to obtain an entirely vacuum heat preservation cavity, and the heat preservation quality is improved; moreover, the low-temperature sealing layer is welded to the interior of the outer shell, the gravity direction of the low-temperature sealing layer is same with the direction of adhesion stress of the outer shell, and the outer shell takes a supporting effect on the low-temperature sealing layer; therefore, the low-temperature sealing layer is unlikely to fall after being used for a long time, the air can be effectively prevented from entering the heat preservation cavity through the venting hole, and the heat preservation effect of the vacuum heat preservation container is ensured.