The invention provides an inner cavity structure for leather liming dehairing. The inner cavity structure for leather liming dehairing is used for solving the problem about how to improve the contactdegree of the inner surface of leather and treating fluid during centrifugal rotating of the leather. The inner cavity structure comprises an inner cavity for containing the leather and pile heads arranged in the inner cavity. The pile heads are fixed to the inner wall of the inner cavity and are different in length and thickness, and a fluctuant impact surface is defined by the pile heads. The adjacent pile heads are connected through serpentine coil springs which define a rebounding surface, and the rebounding surface is located between the inner wall of the inner cavity and the impact surface.