Energy-saving device with good surface protection effect for building

The utility model discloses a building energy-saving device with a good surface protection effect, and relates to the technical field of building energy-saving devices, the building energy-saving device comprises a building body, the middle part of the top end of the building body is fixedly connected with a cleaning mechanism, and the middle parts of the front side and the rear side of the top end of the building body are fixedly connected with solar panels; protective sliding plates are symmetrically arranged at the two ends of the top of the building body, protective mechanisms are fixedly connected to the front sides and the rear sides of the two ends of the top of the building body, T-shaped sliding grooves are formed in the middles of the top ends of the protective mechanisms, and T-shaped sliding blocks are slidably connected into the T-shaped sliding grooves. The top end of the T-shaped sliding block extends out of the T-shaped sliding groove and is fixedly connected with one end of the bottom of a pr