Shrinkage and crack resistance experiment of mortar table are carried by according to steel fiber with 0, 0.5% and 1.0% volume dosage and polypropylene fiber with 0, 0.05%, 0.1% volume dosage. The results indicate that, when volume content of steel fiber and polypropylene fiber is 0.5% and 0.05% respectively, the effect of crack resistance is level 3; and this effect on crack resistance is turned to be level 1 when the volume dosage of steel fiber and polypropy-lene fiber is 1.0% and 0.1%. The comprehensive analysis shows that there is coorperative effects of crack resistance on steel-polyprop...