Research conclusions：The research and analysis of the requirements of catenary-pantograph relation as well as the examined data show the evaluation standard used for the catenary-pantograph relation of Beijing-Tianjin Intercity Railway is feasible, which can be as the technical reference to the OCS design simulation platform and the standard engineering evaluation system in China. The proposals are made that for reducing the off-wire spark of high-speed electrified railway, the pantograph design should be optimized and the tension of contact wire should increase to 30kN, and for reducing the elasticity difference of contact wire, the dropper length should be calculated precisely and the installation error should be controlled strictly during construction.