A heat insulation door for a refrigeration appliance, comprising: a heat insulation vacuum glass module, wherein the vacuum glass module comprises a first glass plate and a second glass plate that are overlapped and have a first interval; and a third glass plate overlapped on the vacuum glass module and having a second interval with the vacuum glass module; characterized in that the second interval is filled with inert gas, further comprising a fourth glass plate that is overlapped on a side of the vacuum glass module away from the third glass plate and has a third interval with the vacuum glass module, wherein the third interval is filled with inert gas, wherein along a front-to-rear direction of the door, one of the third glass plate and the fourth glass plate is located in front of the vacuum glass module as a front decoration plate, and the other one is located at the back of the vacuum glass module as a rear protective layer; and in a width and/or length direction of the first glass plate, the front decoration plate has a protruding portion that extends out of an edge of the vacuum glass module, and wherein the heat insulation door further comprises a doorframe surrounding the vacuum glass module, wherein the doorframe comprises: a first cooperative wall, located on a rear side of the protruding portion and connected to the protruding portion; a second cooperative wall, located behind the first cooperative wall along the front-to-rear direction; and a connecting wall, connecting the first cooperative wall and the second cooperative wall, wherein the vacuum glass module is located between the first cooperative wall and the second cooperative wall along the front-to-rear direction. a heat insulation vacuum glass module, wherein the vacuum glass module comprises a first glass plate and a second glass plate that are overlapped and have a first interval; and a third glass plate overlapped on the vacuum glass module and having a second interval with the vacuum glass module; characterized in that the second interval is filled with inert gas, further comprising a fourth glass plate that is overlapped on a side of the vacuum glass module away from the third glass plate and has a third interval with the vacuum glass module, wherein the third interval is filled with inert gas, wherein along a front-to-rear direction of the door, one of the third glass plate and the fourth glass plate is located in front of the vacuum glass module as a front decoration plate, and the other one is located at the back of the vacuum glass module as a rear protective layer; and in a width and/or length direction of the first glass plate, the front decoration plate has a protruding portion that extends out of an edge of the vacuum glass module, and wherein the heat insulation door further comprises a doorframe surrounding the vacuum glass module, wherein the doorframe comprises: a first cooperative wall, located on a rear side of the protruding portion and connected to the protruding portion; a second cooperative wall, located behind the first cooperative wall along the front-to-rear direction; and a connecting wall, connecting the first cooperative wall and the second cooperative wall, wherein the vacuum glass module is located between the first cooperative wall and the second cooperative wall along the front-to-rear direction. a first cooperative wall, located on a rear side of the protruding portion and connected to the protruding portion; a second cooperative wall, located behind the first cooperative wall along the front-to-rear direction; and a connecting wall, connecting the first cooperative wall and the second cooperative wall, wherein the vacuum glass module is located between the first cooperative wall and the second cooperative wall along the front-to-rear direction.