The invention discloses a bowl-shaped blocking piece mounting device and a using method thereof. The bowl-shaped blocking piece mounting device comprises a hydraulic system, a hopper assembly, a blocking piece seat, a pressing rod and a bottom plate, wherein the hopper assembly is in a cuboid shape, and a hopper groove is formed in the middle of the hopper assembly; an assembling hole is formed inthe transverse position of the middle of the blocking piece seat, and a discharging opening which is vertically communicated with the assembling hole is formed in the top of the blocking piece seat;the pressing rod is cylindrical, and a blocking piece mounting position is arranged at the right end of the pressing rod; the hydraulic system is mounted at the left part of the bottom plate; the blocking piece seat is mounted at the right part of the bottom plate; the hopper assembly is mounted above the blocking piece seat and corresponds to the discharging opening; and the pressing rod is connected with the hydraulic system, and the pressing rod is matched with the assembling hole. According to the bowl-shaped blocking piece mounting device and the using method thereof, the problems that when a bowl-shaped blocking piece is pressed at present, the blocking piece is pressed to be deviated and clamped in the blocking piece seat, the bowl-shaped blocking piece which is pressed to be deformed is relatively tedious and difficult to take out, and due to manual pressing, the pressing force is difficult to control, so that the pressing is not in place, the assembly qualification rate is influenced, and the pressing efficiency is low are solved.