A plastic greenhouse framework in which one end part of a frame is successively connected to another end part of the frame to be folded is provided to be easy to store, transport, handle, install and remove, to reduce labor costs and to suitably control the strength of a plastic greenhouse by controlling the distance of the frame. A plastic greenhouse framework(1) is characterized in that one end part of a frame(10) comprising a plastic greenhouse framework is continuously connected to another end part to be folded. The frame is formed in arch form and has a fixing part(20) containing a through hole in the longitudinal direction of the frame on one end part and a fastening groove in the transverse direction and a fastening part(30) containing a through hole at the same position as the through hole of the fixing part in the longitudinal direction of the frame on another end part. The fixing part and fastening part are connected by a fixing device.
