Solution layering extraction device

The invention relates to the technical field of solvent extraction, and particularly discloses a solution layered extraction device which is characterized in that a vertical sliding rod is fixed on the inner side wall of one side of a liquid separation tank, and a sliding block capable of moving up and down along the sliding rod and floating on the surface of a solution is clamped in the sliding rod; a floating ball valve for controlling the discharge of a solution is fixedly mounted on one side of the sliding block; a floating ball of the floating ball valve is filled with filling liquid with the density smaller than that of the upper-layer solution and larger than that of the lower-layer solution, and the floating ball valve is located between the bottom of the upper-layer solution and the top of the lower-layer solution. The invention aims to solve the problems that the layered solution and the solution with higher density on the upper layer cannot be directly extracted, the lower layer solution can be tak