The invention relates to a device and method for dismantling high-voltage power equipment in a non-contact manner. The device comprises an auxiliary dismantling device and an intelligent non-contact laser cutting device, wherein the auxiliary dismantling device comprises an insulating fixing bracket, an insulating clamp and a spring fixing rod; the insulating fixing bracket is vertically arrangednext to to-be-dismantled high-voltage power equipment; the insulating clamp is arranged at the top end of the insulating fixing bracket and is used for clamping and fixing a high-voltage incoming lineconnected with a high-voltage lead on the high-voltage power equipment; the spring fixing rod is obliquely arranged; one end of the spring fixing rod is arranged on the insulating fixing bracket andthe other end is toward the high-voltage lead on the high-voltage power equipment and is provided with a tension spring; and the tension spring is used for clamping and fixing the high-voltage lead onthe high-voltage power equipment after being elastically stretched. Compared with the prior art, the device has the advantages that safe operation of other power equipment is ensured, the work efficiency is greatly improved, a lot of manpower and material resources are saved, and the device has a great advantage in comparison with a traditional device which can carry out dismantling after a powerfailure.