The whole frame profile is formed by high frequency welding machine, and all splicing points are designed with upper and lower bite, with excellent sealing, it is windproof and rainproof. The profile base steel is 2.5mm galvanized steel and the height of the steel base is 27cm. The column steel is 16cm, The profile of roof beam is 19cm, the frame contains the base line, and the folded height is 40cm.