This paper investigates the electrical contact failure of crimped connections under electro-thermal coupling conditions. Based on the Holm electrical contact model, this study analyzes the contact interface and reveals that contact pressure is the core factor governing contact resistance: its dominance is evident in low-pressure regions, while film layer conditions must be considered in high-pressure regions. By integrating Newton’s law of cooling and the energy conservation principle, and coupling Joule loss with thermal steady-state temperature rise, this paper establishes a relationship curve between the surface temperature rise of terminals and contact pressure, providing a theoretical foundation for engineering pressure parameter design and fault analysis. Ac-cording to the Wiedemann-Franz-Lorenz law and research on conductive spot overheating, the key to mitigating temperature rise lies in ap-plying sufficient contact pressure, as simply increasing the nominal contact area yields limited effects. Through an analysis of electrical contact degradation mechanisms (e.g., creep, stress relaxation, fretting, corrosion, etc.), this paper proposes six targeted strategies to delay the degradation process of electrical contacts.