Building heat preservation structure

The utility model relates to the technical field of building heat preservation, and discloses a building heat preservation structure which comprises a bottom plate, wall bodies are fixedly connected to the two sides of the top of the bottom plate, first connecting blocks are fixedly connected to the sides, close to each other, of the wall bodies, and first tenons are arranged on the sides, close to each other, of the first connecting blocks. First mortise grooves are formed in the inner sides of the first connecting blocks, mortises are formed in the front sides of the first connecting blocks, a heat preservation wall plate is arranged in the middle of the upper portion of the bottom plate, second connecting blocks are fixedly connected to the two sides of the heat preservation wall plate, and second tenons are fixedly arranged on the sides, away from each other, of the second connecting blocks. According to the building heat preservation structure, through cooperation of the bottom plate, the wall body, the