The invention discloses a sinterable-silica-gel mica composite belt, which comprises a mica paper layer and a reinforcing material layer, and also comprises a sinterable silica gel layer; the mica paper layer, the reinforcing material layer and the sinterable silica gel layer are superposed in sequence; the mica paper layer is white mica paper, bronze mica paper or synthetic mica paper; the reinforcing material layer is a glass fiber fabric, a polyester thin film or a polyimide thin film; the total thickness of the mica layer and the reinforcing material layer is 0.01mm to 1mm; the thickness of the sinterable silica gel layer is 0.01mm to 10mm. According to the sinterable-silica-gel mica composite belt which is provided by the invention, through superposing the sinterable silica gel layer, the properties of the mica belt are enhanced, and the mica belt is enabled to have the characteristics of high temperature resistance, water resistance and impact resistance at the same time; the problems that an ordinary mica belt easily absorbs moisture, is not water-resistant and is fragile and infirm after being suffered from a high-strength impact are solved; the sinterable-silica-gel mica composite belt is safer in use; the service life of the mica belt is prolonged; the scope of application of the mica belt is enlarged.