Understanding thecorrelations between solid propellant composition， burning rate characteristics， and safety parameters including the impact， friction， and electrostatic spark sensitivities for both HTPB （Hydroxyl-Terminated Polybutadiene） propellant slurry and its final cured product is crucial for optimizing both the safety profile and performance characteristics of solid composite propellants. This study systematically applies the grey relational analysis method to quantitatively evaluate the relationships between formulation parameters（aluminum content， ammonium perchlorate content， RDX proportion and the total solid loading in the overall mass） and burn rate with the safety parameters measured for both HTPB propellant slurry and its final product. The key influencing factors for each sensitivity parameter were identified. The results indicate that ammonium perchlorate content exhibits the strongest correlation with both impact and electrostatic spark sensitivities in HTPB propellant slurry， while RDX content displays the predominant influence on friction sensitivity. Regarding the sensitivity of the final cured product， aluminum content emerges as the dominant factor influencing impact sensitivity， whereas burning rate and solid content become the primary determinants affecting the friction and electrostatic spark sensitivity， respectively.