double vinyl greenhouse and the clamp for the double vinyl greenhouse and the method of building the

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PURPOSE : A dual plastic greenhouse, a fixing clamp for building thereof, and a building method thereof are provided to enable users to easily install, remove, repair, and manage the greenhouse. CONSTITUTION : A dual plastic greenhouse comprises the following : a frame(10) installed on a bottom surface(1); an external sheet(20) covering the outer surface of the frame, formed with a light-transmissive material; plural fixing clamps(30) connected to the frame, and extended toward the inside of the frame; an inner sheet(40) with the outside fixed to the fixing clamp for forming a space unit, and the lower edge fixed to the bottom of the frame; a fixing unit(31) fixed to the frame; an extension unit(32) extended toward the inside of the frame from the fixing unit; a holder(33) for fixing the outside of the inner sheet; a housing(33a) including an opening(33b), formed with a metal material; a fixing block(33c) with a fixing groove, fixed to the housing; and a fixing bar fitted to the fixing groove.