An electrospinning nanofiber membrane preparing device with a heating function relates to electrospinning nanofiber preparing devices. A spray head is fixed on a liquid supply device, and a rotary drum is internally provided with an electric heating element; one end of a rotary drum shaft is a metal electrode which is connected with the negative pole of a high-voltage power supply and is grounded; one end of an insulating rod is connected with an output shaft of a rotating motor, and the other end of the insulating rod is fixedly connected with the metal end of a rolling shaft; the other end of the rolling shaft is insulated, and a hollow wire connecting hole is formed in the end of the rotary drum shaft; a temperature measuring element is arranged on the surface of the rotary drum; the temperature measuring element is connected with a numerical-control temperature unit which is connected with a relay, and the relay is connected with the electric heating element so as to form a temperature control part; an arc-shaped heat-insulating cover is coaxial with the rotary drum and is fixed on a heat-insulating cover support frame; a rotary drum support frame and a motor support frame are installed on a horizontal moving device; and the horizontal moving device is connected with a translation motor. According to the invention, ordered deposition of the nanofiber, control on uniformity of the nanofiber membrane and heating of the nanofiber in the electrospinning process can be completed synchronously.