The utility model discloses a spool mills a mouthful device, including horizontal casing and vertical casing, be equipped with the gearbox in the vertical casing, the gearbox top is equipped with first transmission shaft, and the left end of first transmission shaft is worn out horizontal casing and is linked to each other with a rocking handle, is equipped with a bevel gear on first transmission shaft, be equipped with the one and the 1st bevel gear engaged with the 2nd bevel gear on the input shaft of gearbox, be equipped with 1 the 3rd bevel gear on the output shaft of gearbox, be equipped with the secondary drive axle in horizontal casing, the rear portion of secondary drive axle be equipped with with the 3rd bevel gear engaged with fourth bevel gear, the front end and the drill bit type of secondary drive axle mill the mouthpart and link to each other, the drill bit type mills the mouthpart and by milling the mouthpart and supporting the handle to constitute, mills the mouthpart and for the four sides all is trapezoidal terrace with edge, mills the rear side middle part of mouthpart and support the front end of handle to link firmly, supports the rear end of handle and secondary drive axle front end to link to each other. The utility model discloses it is simple to use, convenient, carry easily and can reduce intensity of labour, save time.