The invention discloses a raw material storage device comprising an oil storage bucket body and a bucket cover arranged at the top end of the oil storage bucket body. A placement inlet is formed in the bucket cover; a sealing cover is arranged on the placement inlet; the bucket cover is fixedly connected with a CPC joint, wherein the CPC joint comprises the outer joint body and the inner joint body; the outer joint body is connected with an externally-connected oil pipe; and the inner joint body is connected with an internally-connected pipe. The raw material storage device has the beneficial effects that the structure is simple, using is convenient, processing cost is low, pollution is avoided, and oxidative deterioration of oil is effectively prevented.