The type produced by Qingzhou Changrong Greenhouse Engineering Co., Ltd. has no support columns in its design structure, and the beams require thicker wooden rods, which relatively increases the cost. For the column-type greenhouse, the construction method for the front roof frame is to set two front columns for every 3 meters according to the direction of the arch rods, and to install small hanging columns to support the arch rods. The height of the small hanging columns is 20 meters. Small holes are drilled 50 meters from both ends of the small hanging columns, and iron wire is passed through the holes, fixed on the horizontal beam at the bottom, and fixed on the flagpole at the top. The arch rods are generally made of bamboo strips.