The invention discloses an insulating salver casting mould structure and a stripping method. Before casting, a casting mould positioning sleeve is connected with a pneumatic stripping device which is provided with an air nozzle and a spare plug; after the casting, a male mould and a female mould are separated first, and an insulating salver casting member is remained at one side of the female mould; a special screw nail connected with a central conductor through the pneumatic stripping device is removed and replaced by the spare sealing plug of the pneumatic stripping device, so a sealed air chamber for stripping is formed in the center of the positioning sleeve; a compressed air connector connected with a high-pressure air source is communicated with the air chamber through the air nozzle of the pneumatic stripping device, the insulating salver casting member is blown out of the male mould by high-pressure air along with the instant rise of air pressure after a compressed air valve is opened, and then a stripping course is completed. The invention has standard operation of the stripping of the casting mould and can not easily destroy the moulds and the casting member, thereby obviously improving the production efficiency and the quality of casting products.