The invention discloses a method and a device for monitoring leakage of a stator shielding sleeve of a shield pump. The device comprises a pressure sensor, a processor and a temperature sensor, wherein a data receiving end of the processor is connected with an output end of the pressure sensor, the pressure sensor is used for monitoring a pressure value of a stator cavity of the shield pump; an output end of the temperature sensor is connected with the data receiving end of the processor, and the temperature sensor is used for monitoring temperature of an outlet of the shield pump; the processor determines an operating state of the shield pump according to the obtained temperature value; the processor calls a preset threshold value according to the operating state of the shield pump, and compares the called threshold value with the obtained pressure value or a change rate of the obtained pressure value; and the processor outputs a leakage situation of the stator shielding sleeve of theshield pump according to a comparison result. The function implementation of the device depends on the method. With the adoption of the device and the method, the reliability of leakage monitoring ofthe stator shielding sleeve of the shield pump can be improved, and the response time can be shortened.