The invention discloses a material pumping device for pumping liquid from a vessel with an opening formed in the upper side. The material pumping device comprises a material pumping mechanism and a drive mechanism, wherein the material pumping mechanism is composed of a material pumping pipe and an isolation hood; a feeding hole of the material pumping pipe is formed in the isolation hood; a material pumping opening is formed in the side surface of the isolation hood; and the material pumping mechanism is installed in a suspension manner so as to extend downwards into the vessel and moves up and down driven by the drive mechanism. According to the material pumping device disclosed by the invention, when the material pumping mechanism pumps a material, a liquid material in the vessel can enter the isolation hood approximately in the horizontal direction only, so that the material pumped by the material pumping device is corresponding to a level where the material pumping opening is located, and a material at an upper layer or a lower layer is prevented from being pumped.