Coating, preparation method thereof and electronic device

The invention relates to the technical field of high polymer materials, and provides a coating, a preparation method thereof and an electronic device, and the coating comprises the following components in percentage by weight based on 100% of the total weight of the coating: 40-60% of a resin matrix, 20-50% of a heat-conducting filler, 0.5-1% of a coupling agent, 5-10% of a diluent, 0.5-5% of a plasticizer, 2-5% of a curing agent and the balance of a solvent, the heat-conducting filler comprises granular heat-conducting filler, and the granular heat-conducting filler is composed of micron-sized heat-conducting filler particles and nano-sized heat-conducting filler particles combined on the surfaces of the micron-sized heat-conducting filler particles. According to the coating provided by the invention, as the heat-conducting filler contains the composite granular heat-conducting filler with a core-shell structure, the number of contact points is increased, and more heat-conducting passages can be formed, so t