The invention discloses a cement tank sealing member. The cement tank sealing member comprises a sealing ring body, wherein the sealing ring body comprises an upper sealing body and a lower sealing body which are mutually connected; the diameter of the opening of the end face of the upper sealing body is greater than that of the opening of the end face of the lower sealing body; the wall thickness of the end face of the upper sealing body is greater than that of the end face of the lower sealing body; and the middle of the sealing ring body is outwards provided with multiple frameworks. The upper sealing body and the lower sealing body are molded for once by adopting a rubber material. The cement tank sealing member solves the problems in the prior art that two sealing members need to be manufactured and the manufacturing cost is relatively high as different sealing members need to be used at two close positions, the installation is also very troublesome as the two sealing members need to be fixedly installed during the assembling, the installation time of an oil seal is increased greatly, and the production efficiency is lowered. The cement tank sealing member which is simple in structure, relatively low in production cost, rapid and convenient to install, and capable of sealing two oil seal positions at the same time is provided.