Abstract: Vulcanization plays a key step in rubber forming and processing. In this work, a low?field nuclear magnetic resonance instrument was used to analyze the crosslinking density of rubber materials at different curing times, and the obtained results were compared with the torque measured by the disc?type curometer at the same time. The results indicated that the relationship between the torque and crosslinking density is approximately linear. The degree of cure distribution was calculated by means of the finite element heat transfer analysis and self?written algorithm, and the simulation results for temperature?rising curves and degrees of cure on the surface and in the heart of cylindrical rubber specimens were highly consistent with the experimental data. This work provides a design reference for the vulcanization process of rubber articles.