To address the multi-medium heat transfer issue related to the temperature rise charaeteristies oftubular fuses ,a thermal-eleetrieal analogy-based LT'spice model was constructed.This model incorporates thejoule heating source of the fuse element , heat conduction through the air/glass layers, and natural convection.ltwas used to simulate the temperature rise on the surace of the fuse element and the inner and outer sufaees ofthe glass tube,The results show that the thermal resistanee of the air layer ( 1 092.4] K/W) accounts for 90.089 of the total thermal resistance ,resulting in an interfacial temperature diferenee of 785,29 K, while the lowthermal resistanee of the glass layer (0.24 K/W) only causes a temperature drop of 0. 17 K. Using asyuchronized infrared thermal imaging monitoring system, the thermal cquilibrium temperature of the fusesurfaee was measured to be 389 K,The temperature rise curve of the fuse surface aligns well with the simulationresults.The developed [Tspice thermal resistanee network model is computationally elicient and can beelfeetively used in teaching, helping students understand Fourier's law of heat conduetion , Newton's law ofeooling,and the analysis methods of dynamic thermal processes.