The utility model relates to an uncoiler used for producing a heat retaining panel. The uncoiler used for producing the heat retaining panel comprises a machine frame, a drive device and a delivery roller, wherein the drive device is arranged on the machine frame, the delivery roller is arranged on the machine frame in a rotating mode and a moving mechanism is arranged below the delivery roller. A bearing platform is arranged on the moving mechanism which is provided with a support platform, wherein the lifting height of the support platform is adjustable. An adjusting screw rod is arranged between the support platform and the bearing platform. The upper end of the adjusting screw rod is arranged on the support platform and the lower end of the adjusting screw rod penetrates the bearing platform. A lock nut is arranged on the adjusting screw rod. In the process of production, a roller which coiled with a raw material panel is arranged on the delivery roller, the lifting height of the supporting platform can be adjusted according to the diameter of the roller which coiled with the raw material panel previously, installation requirements are satisfied, and therefore the problem of inconvenient installation because of the heavier weight can be solved. In addition, the roller coiled with the raw material panel can be moved in the left-right direction according to the requirements and enabled to be matched with corresponding equipment. The maneuvering capability of the uncoiler can be improved and therefore application range can be improved.