The invention provides a device for melting a thermo-sensitive film master batch by adopting a form of a vacuum tank. The device for melting the thermo-sensitive film master batch comprises a fixed frame, a nitrogen inlet pipe, a circulation chamber, a three-level pressurizing chamber and a vacuum chamber. The fixed frame is installed on a wall. A tank body is fixed to the middle of the fixed frame. The three-level pressurizing chamber is controlled by a hydraulic rod above the fixed frame. The vacuum chamber is arranged in the circulation chamber. The gas inlet end of the nitrogen inlet pipe is arranged on the three-level pressurizing chamber. The gas outlet end of the nitrogen inlet pipe is directly connected with a gas inlet of the vacuum chamber. The tail end of the circulation chamber is further provided with a wind suction implement. According to the device for melting the thermo-sensitive film master batch, the form of the vacuum tank is adopted for melting the thermo-sensitive film master batch, so that the thermo-sensitive film master batch does not contain impurities of air any more, and accordingly the quality and the sensitivity coefficient of a finished film is effectively improved.