Abstract: DC energy consumption device is an electronics electronic equipment that temporarily excess energy is temporarily excess energy in the DC-side consumption system in the offshore wind power flexible DC system. The DC energy consumption valve is the core equipment for energy consumption devices. This article introduces the structural design, simulation and testing of a directly connected DC energy tower product. According to the IEC 62501 standard, the insulation test of DC energy consumption valve tower products is completed. The test results show that the technical performance of the product developed in directly connected type DC energy tower meets the design requirements.