The present invention has it in forming the greenhouse to grow forcing cultivation or winter cultivation and tropical plants, vegetables and flowers, the intensity corresponding to the strong and frequent wind or large snow cover according to a prefabricated greenhouse structure to reduce damage to damage , and characteristic configuration, in a plurality of the mold frame and the support frame connected to the support structure and the outer prefabricated greenhouse construction consisting of a coating agent so as to cover consisting of corresponding to the land of the already width and a length set, the coating agent It is, as a plate member of a belt-like having a width and a length already set, the mold frame and the support panel, the installation comprising, supported on / or support frame; A plate member having a different width and a different length have already set up, the coated panel has a bottom portion forming a eonhyeojyeo arranged so as to overlap the widthwise edge portion of the supporting panel; As a plate material of the strip corresponding to the support panel, the cover panel for covering the upper surface edge portion of the cover panel; It comprises; and a fastener for fixing the supporting panel and the cover panel widthwise intermediate portion to install the supporting panel and the cover so that the support covered with the pressing panel rests on the panel between the panel and a cover panel according to the.