Energy Efficient Building

The invention discloses an energy-efficient building which comprises a hanging piece, a horizontal keel, a heat preservation board, a main keel, an auxiliary keel, an engagement piece and a frame, wherein the tail end of the right side of the hanging piece is provided with the horizontal keel such that the hanging piece and the horizontal keel form an integrated structure; the horizontal keel is acylindrical structure having a circular cross section having a radius of 3cm to 4cm; and the bottom of the main keel is attached to the edge of outer wall of the auxiliary keel. The energy-efficientbuilding is provided with the heat preservation board, a support plate supports the bottom of a device, the edge is connected to the outside, the middle part is connected with a benzene board throughan adhesive, the benzene board maintains the temperature in the device in cooperation with the heat preservation layer to prevent temperature loss from affecting the workability of the device, therebyimproving the heat preservation performance of the device and avoiding the poor heat preservation performance of the device.