The utility model belongs to the technical field of domestic warmhouse booth equipment is used, specifically disclose composite structure of warmhouse booth PC sunshine board assembly, constituteed bylower positioning component and last locating component. The utility model discloses a composite structure of warmhouse booth PC sunshine board assembly's beneficial effect lies in: the reasonable last locating component and lower locating component of its project organization, utilize first connecting plate during the equipment, the second connecting plate, third connecting plate and third connecting plate are through first convex trip, second convex trip is connected, it assembles high -efficiently, it is stable, it is accurate, the efficiency of the assembly is effectively improved, the positioning screw, spiral connecting hole and position sleeve structure, realize that auxiliary equipment acts on, the structural stability of post assembling has also been improved, pressure -bearing shape etc, it is yielding to have solved current PC sunshine board assembly fastener post assembling, drop, fracture and inconvenient installation, the phenomenon of dismantling, wide application range.