Automatic spraying device for building outer wall

The utility model discloses an automatic spraying device for a building outer wall, which belongs to the technical field of spraying equipment for the building outer wall and comprises a hanging basket, a storage box, an adjusting assembly and a paint spraying gun, the hanging basket is of a hollow net structure formed by welding a plurality of steel plates and reinforcing steel bars, the storage box is mounted in the hanging basket, and an adjusting mechanism and the paint spraying gun are mounted on the outer side face of the hanging basket. A plurality of paint spraying guns are arranged, one paint spraying gun is connected with an adjusting mechanism, all the paint spraying guns are connected with a storage box, the storage box provides paint for each paint spraying gun, every two adjacent paint spraying guns are connected through a contraction assembly, a servo motor is further installed in the hanging basket, the servo motor is connected with an adjusting assembly, and the adjusting assembly is connecte