The catalyses effect of triphenyl bismuth（TPB）on the cure of HTPB-based high burning rate propellant is investigated. The experimental results show that TPB can reduce the curing temperature and time of the said propellant without any negative effect on its processability and mechanical properties. It is found that the optimal dosage of TPB is in the range of 0.006～0.05% of the total weight of the propellant cured at 50℃ for a week.