The utility model belongs to cutting ferrule pre -installation machinery discloses a cutting ferrule pre -installation device, cutting ferrule pre -installation device include hydro -cylinder, bolt, hydro -cylinder board, integral type pre -installation frame, mould baffle, wherein, the hydro -cylinder links to each other with the hydro -cylinder board, the hydro -cylinder board links to each other with integral type pre -installation frame, integral type pre -installation frame links to each other with the mould baffle. The hydro -cylinder outside is located to the bolt. The utility model discloses a cutting ferrule pre -installation device places the pre -installation mould on through oil cylinder piston rod, pushes up forward, makes the cutting ferrule press close to the mould baffle, reaches certain pressure value, carries out the electric hydraulic pressure messenger during operation that converts into when making the cutting ferrule preassemble the cutting ferrule pre -installation and puts in right place in one step. Has efficient, the fast advantage of pre -installation.