Under the background of the first shipboard application of the medium voltage direct current (DC) integrated power system, the technical principles and characteristics of several high-power medium voltage DC test loads that were successfully developed in China recently are studied aiming at the mooring test load requirements of the large-capacity marine medium voltage DC power station. The performance of these test loads is then summarized and compared. Finally, suggestion of designing an energy-feedback combined load system is proposed together with the actual application conditions of the test loads in the shipyard mooring test and the development of the marine test loads. The test load function can be achieved while reasonably utilizing the energy generated during the power station test, in order to provide a preliminary scheme of the load system. It can provide theoretical references for the selection and application of the subsequent large-capacity medium voltage DC power station test load.