In order to study the fatigue characteristics of FRC/steel embedded T-joint, the vacuum forming process (VARTM) and stitching technology were used to make T-joint, and the tension-tension fatigue test was carried out on the joint using the Letry fatigue testing machine. According to the fatigue test results, the initial damage characteristics and damage evolution of T-joints under tension-tension fatigue load were studied; based on the two-parameter Weibull distribution model, fatigue reliability analysis of T-joint connection joints was carried out, and the distribution law of fatigue life of joints under different stress levels was fitted. The fatigue reliability function of joints under different stress levels was given, as well as the stress/life double logarithmic curve relationship (R-lnS-lnN curve) of joints under specified reliability levels. The results show that ln ln[1/R(N)] has a good linear relationship with lnN, and the fatigue life of T-joints follows Weibull distribution; the double logarithmic equation of fatigue life reliability establishes the relationship between reliability, fatigue life and fatigue stress, which can guide the fatigue reliability design and engineering application of joints.