采用单向拉伸和扫描电子显微镜的实验手段，研究了慢拉伸速率对丁羟复合固体推进剂拉伸性能的影响，并对不同拉伸速率下丁羟推进剂的破坏机理进行了分析． The effects of slow stretching rate on the tensile properties of the BHT solid propellant were investigated by means of uniaxial tensile test and scanning electron microscopy. The failure mechanism of BHT propellants at different tensile rates was also analyzed.