Green high performance fiber reinforced concrete was prepared using cellulose fiber， agricultural waste rice husk ash， and other materials. The effect of three factors， namely cellulose fiber admixture， rice husk ash admixture， and water-cement ratio， on the strength， flexural toughness， and slump of concrete were investigated by orthogonal tests， and the strengthening and toughening mechanism of rice husk ash and cellulose fiber was analyzed. The results showed that the compressive strength and splitting tensile strength of concrete decreased significantly with the increase of water-cement ratio and increased with the rice husk ash admixture and cellulose fiber admixture； the flexural initial crack strength and ultimate flexural strength of concrete increased gradually with the rice husk ash admixture and cellulose fiber admixture； cellulose fiber can not only resist cracking and toughening but also play the role of “internal maintenance”. The rice husk ash plays a micro-aggregate filling effect and volcanic ash effect in the concrete mix， which can also enhance the mechanical properties of concrete.