Abstract: In view of the problems of difficult support, poor support effect and difficult pressure relief of surrounding rock in anchor net shotcrete technology for mine roadway support, this study discusses the feasibility of replacing traditional anchor net shotcrete support with fiber concrete, aiming at improving support efficiency, enhancing surrounding rock stability and optimizing cost. The mechanical properties of different fiber concrete are systematically analyzed by means of theoretical analysis, laboratory test and field industrial test. By comparing the punching shear capacity of the shotcrete layer of fiber concrete and anchor net, and conducting field tests under actual ground pressure conditions, the failure mode and support effect of the fiber concrete shotcrete are verified. The results show that the incorporation of crude fiber can effectively improve the compressive strength of concrete, and the on-site construction operation is simple. With the increase of curing age, the tensile strength growth rate of fiber concrete block is significantly accelerated. Although its early mechanical properties are relatively weak, the later tensile strength is significantly higher than that of concrete specimens without fibers. The theoretical calculation confirms that the punching shear capacity of fiber concrete shotcrete support is better than that of anchor net shotcrete support, which provides theoretical support for its replacement of anchor net support. The field industrial test further observes that the fiber concrete shows obvious ductile failure characteristics, and the crack propagation is effectively inhibited. The bridging and pulling effects of the fibers in the cracks contribute significantly to the crack resistance effect. The research proves that fiber concrete can effectively enhance the restraint effect on surrounding rock, delay the cracking process, maintain the stability of roadway and reduce the deformation. At the same time, it shows the potential to reduce the support cost, which provides technical support for fiber concrete to replace traditional anchor net shotcrete support, and has important reference value for the optimization of similar mine support technology.