The invention relates to a cable cold shrink intermediate joint interface pressure measuring apparatus and method thereof. The apparatus includes a plurality of pressure sensors, a signal acquisition unit, and a data processing unit, the pressure sensors are pre-embedded in the cross-linking polyethylene insulation surface on the starting side of the cold shrink tube of a cable cold shrink intermediate joint and is corresponding to the middle parts of the core-pulling silicone rubber of the cold shrink tube and the cross-linking polyethylene interface, the pressure sensors are equally spaced in the same circumference, the signal acquisition unit reads the electrical signals generated by the pressure sensors in real time during the cable normal running process and transmits the electrical signals to the data processing unit, and the data processing unit obtains the interface pressure value of the cable cold shrink intermediate joint according to the preset corresponding relation between the electrical signals and the pressure values. According to the invention, the direction measurement of the cable cold shrink intermediate joint interface pressure is realized, and the errors brought by the indirect measurement can be prevented, so that the accuracy of the measurement result can be effectively improved.