Insulation fusion interface equivalent simulation method for experiment and preparation device

The invention discloses an insulation fusion interface equivalent simulation method for experiments and a preparation device, and belongs to the field of power cable insulation design and manufacturing. The problems that an existing high-voltage submarine cable flexible joint fusion interface performance test is large in difficulty and high in cost, and an efficient, economical and reliable flexible joint interface simulation molding method and device are lacked are solved. According to the method for testing the electrical characteristics of the fusion interface of the high-voltage submarine cable flexible joint based on the plunger type high-voltage capillary rheometer and the device used by the method, the prepared sample can simulate the insulation fusion interface between primary insulation and recovery insulation of the cable flexible joint, so that the preparation period of the flexible joint sample for a laboratory is greatly shortened; the method has the characteristics of short preparation period, l