Inordertoanalyzetheunevensettlementandinstabilityofcoarse-grainedsoilof embankment upon slopes in Hang x in jing expressway， based on the saturated-unsaturated see page theory and combined with relevant experimental data and meteorological data，coarse-grained slopes'see page characteristics and change of stability under rainfall infil tra-tion are analyzed using numerical software.Research indicates the greater the inclination of the bedrock， the more prone to the positive porewater pressure in the coarse grained em-bank ment.In different bedrock inclination， the safety factor of the coarse grained soil em-bank ment decreases with the rainfall， after the rain stopped， the safety factor quickly re-stored.The greater the inclination of bedrock， the lower the safety factor of slope em bank-ment under the same conditions.The greater the inclination of bedrock， the smaller the effect of rainfall on the safety factor of coarse-grained soil of embankment upon slopes.The maximum settlement value of coarse-grained soil of embankment upon slopes increases with the inclination of bedrock.