Insulating mobile phone case

The invention provides an insulating mobile phone case which comprises a case body, a fixed connecting joint, a heating wire and a two-ended connecting line; the heating wire is wriggly spiraled a case body base plate which adopts a double-layer material, the upper layer is made of heat-conducting materials, and the lower layer is made of heat-insulating materials; the fixed connecting joint connected with the heating wire is arranged at the tail part of the case body, and a circuit conversion structure is designed in the fixed connecting joint; one end of the two-ended connecting line is connected with the fixed connecting joint, and the other of the two-ended connecting line is connected with a mobile phone interface. According to the insulating mobile phone case, the temperature of the mobile phone can be guaranteed in outdoor use in winter by supplying power for the heating wire in the case body through the mobile phone, so that the mobile phone can be always kept within a proper temperature range in outdoors use, and the service life of the mobile phone can be prolonged; in addition, the contact part is more comfortable when people holds the mobile phone outdoors in winter.