Abstract:According to the requirements of winding technology and special use environment of low temperature liquid oxygen tank, the technological characteristics of three kinds of self-made epoxy resin and the property of low temperature crack resistance were studied. Then, the mechanical properties of T700 carbon fiber reinforced composites were investigated under ultra-low temperature and high-low temperature cycling treatments. Finally, a small carbon fiber reinforced composite cylinder was used for the comprehensive performance test. The results showed that SFC-3 epoxy resin had better winding technology and excellent crack resistance property under ultra-low temperature and high-low temperature cycling treatments. After the aforementioned treatments, the tensile performance retention rates of T700/SFC-3 epoxy composites were above 92% respectively, and the composite material had good liquid oxygen compatibility. T700/SFC-3 epoxy resin composite cylinder had excellent high and low temperature stabilities and gas tightness.