Building external wall thermal insulation structure

The utility model discloses a building external wall heat preservation structure, and relates to the technical field of external wall heat preservation structures, the building external wall heat preservation structure comprises a wall body, the front side of the wall body is fixedly connected with a base plate, the front side of the base plate is fixedly connected with a connecting column, the side face of the connecting column is movably sleeved with a heat preservation plate, and an inserting groove is formed in the inner wall of the heat preservation plate; four grooves are formed in the side face of the connecting column, fixing rods are movably connected to the inner walls of the four grooves in an inserted mode, first springs are arranged between the fixing rods and the inner walls of the grooves, and one ends of the fixing rods are movably connected with the inner walls of the inserting grooves in an inserted mode. When the heat preservation plate is impacted, the heat preservation plate moves backwar