The invention discloses a compression cup. The compression cup comprises a cup body (1) in a shape of an inverted round table, and the cup body (1) is made from waterproof flexible materials; the cupbody (1) is intervally provided with reinforcing rings (2) which have the same width, for two adjacent reinforcing rings, the inner diameter of the lower end of the upper reinforcing ring is larger than the maximal outer diameter of the lower reinforcing ring, and the separation distance, of the two adjacent reinforcing rings, equals to the width of any reinforcing ring; the compression cup further comprises a cambered block (3), and the cambered block (3) is in magnetic connection with the outer wall of each reinforcing ring (2). The compression cup is simple in structure, and convenient in use. By intervally arranging the reinforcing rings (2) on the cup body (1), the structure of the cup body (1) is improved; and the outer sides of the reinforcing rings (2) are in magnetic connection with the cambered block (3). When in actual use, only the cambered block (3) needs to be placed into the interval between two adjacent reinforcing rings (2), can the cup body (1) be supported, and the use is more convenient.