The invention discloses an experimental device for heat transfer of a phase-change material and a test method. The experiment device comprises an outer glass cover, a heat insulating material, an inner glass cover and a heating copper plate; the outer glass cover comprises two cuboid organic glass plates, symmetrical through holes are formed in the four corners of the outer glass cover, the inner glass cover is installed in the outer glass cover, and the heating copper plate is pasted on the side wall of an inner cavity formed by the inner glass cover and used for heating the phase-change material in the inner cavity; the portion between the outer glass cover and the inner glass cover is filled with the heat insulating material; the outer glass cover is fastened and extruded by bolts to apply outer pressure on the heat insulating material, the heat insulating material extrudes the inner glass cover to ensure that the phase-change material in the inner cavity does not overflow, and phase-change material heat transfer experiments at different angles are carried out. The experimental device can use a data acquisition instrument for being externally connected with a temperature thermocouple to measure the temperature in the device and can use optical shooting or infrared imaging for presenting the appearance of the phase-change material particularly the change of the phase-change layer, so that the imaging research process is simple, and measurement data is accurate.