Preparation method of ceramic composite material for busbar insulating layer

The invention belongs to the technical field of busbar insulating layer composite materials, and relates to a preparation method of a ceramic composite material for a busbar insulating layer. The preparation method comprises the following steps: mixing unvulcanized silicone rubber, a structure control agent, a reinforcing agent, a ceramic forming filler, a sintering aid and a vulcanizing agent in a mass ratio of 100: 30: 8: (9-11): (9-11): 1.5 at the mixing temperature of less than 60 DEG C to obtain a rubber compound; tabletting and vulcanizing the rubber compound in an environment of 130 DEG C to obtain a processing precursor; and filling and compacting the processing precursor by using alumina powder, sintering the processing precursor in an air atmosphere, and obtaining the ceramic composite material for the busbar insulating layer after sintering is completed. According to the invention, the unvulcanized silicone rubber is added in the mixing process, so that the processing of a precursor is facilitated,