This paper presented the feasibility of improving engine performance and pollutant emissions of a ZS195 diesel engine by EGR and intake hydrogen enrichment. At rated speed, the effects of EGR rate and hydrogen addition on the engine performance, pollutant emissions and economic characteristics were experimentally investigated. The results showed that when EGR rate is constant, peak pressure and maximum rate of pressure rise increase with hydrogen addition. The EGR and intake hydrogen enrichment can reduce HC, CO and smoke level, but the NOx emission increases. The combustion speed and thermal efficiency increase with the hydrogen addition when EGR technique is adopted.