Abstract: Based on Monte-Carlo method,the interfacial microstructure dependence of the asymmetry of hysteresis loop,the exchange-bias field and the coercivity in FM/AFM bilayers was studied,in which the interfacial microstructure is tuned by incorporating nonmagnetic impurities in the AFM layer.The results show that both the asymmetry of hysteresis loop and the exchange bias field strongly depend on the way of dopping,however the corcivity is hardly influenced.Moreover,the temperature dependence of both the exchange-bias field and the coercivity is closely related with the way of dopping.Therefore,the interfacial microstructure plays an important role in the magnetic properties of FM/AFM bilayers,i.e.changing the asymmetry of hysteresis loop,the exchange-bias field and the coercivity.Meanwhile,these results also imply that spin-valves with large exchange bias field,small coercivity and good thermal stability as well can be realized by tuning the interfacial microstructure.