Transition type external wall insulation board

The utility model discloses a transition type external wall insulation board, which relates to the technical field of building materials, and comprises an L-shaped transition board, the L-shaped transition board is arranged at the corner position of the side surface of a wall body, and the two ends of the L-shaped transition board are respectively provided with a sliding chute. The connecting devices are arranged on the two sides of the L-shaped transition plate and used for connecting heat preservation plates on the two sides of the corner position of a wall, the plug pins are pulled out of the connecting plates, the springs rapidly eject the connecting plates under the action of elastic force, the connecting plates and the heat preservation plates are converged and connected, the screw rod handles are rotated, the screw rod pieces penetrate into the screw holes, and in the process, the screw rod handles push the mounting plates. Due to the fact that bonding glue is arranged below the mounting plate, the sid