In order to adapt to the reality and demand of high bearing capacity of modern long-span bridge, the cable must be crossed to the super-large hole position. Overem has been committed to the research of the cable system of steel strand, based on the international code as the design basis, according to the code and engineering design requirements, the fatigue test of the cable component of the OVM250 ultra-large hole cable system fatigue stress range meets and exceeds the requirements of the international code, the test results show that the OVM250 ultra-large hole cable fatigue The performance reaches the international advanced level.