Abstract: Composite pre-tightening tooth connector has a good static performance, but the fatigue performance had never been deeply researched. The two multitooth composite connectors with bolt hole and without bolt hole are researched. The research shows that: The fatigue behavior of the glass fiber reinforced resin matrix composites is determined by the tensile fatigue behavior of the glass fiber reinforced resin matrix composites, but not by the shear fatigue behavior.