Device for preventing vertical seam between light partition boards from cracking

The utility model provides a device for preventing a vertical seam between light partition boards from cracking, and relates to the technical field of building construction. Comprising a fixed base and two sandwich plates arranged on the fixed base in pairs, the sandwich plates are embedded in the light partition board, and a connecting assembly for connecting the two sandwich plates is arranged on the fixed base. The sandwich plate is embedded in the light wall body, so that the flatness between the sandwich plate and the light wall body is increased, and the stability and the aesthetic property when the structure is adopted for connecting the light wall body are ensured; and a groove matched with the thickness of the sandwich plate is formed in the lightweight wall body by a grooving machine in advance, so that the connection tightness between the sandwich plate and the lightweight partition wall plate is increased, and the phenomena that mortar blocks a gap between the lightweight partition wall plates and