Phase change heat storage vacuum cup

The utility model discloses a phase change heat storage vacuum cup, and belongs to the technical field of vacuum cups. A phase change heat storage vacuum cup comprises a shell and a cup cover and further comprises an inner container fixedly connected in the shell and used for storing water; the heat storage shell is fixedly connected to the inner container, the heat storage shell is located between the inner container and the outer shell, and a gap is reserved between the heat storage shell and the outer shell; according to the utility model, the sodium acetate supersaturated solution is shaken to be converted from a solution state to a solid state so as to heat water, and the sodium acetate supersaturated solution absorbs the heat of the water after absorbing boiled water at 100 DEG C which is just poured, so that the sodium acetate supersaturated solution is converted from the solid state to the solution state and returns to the initial state again; therefore, the phase change conversion is achieved, and th