The invention discloses a crushing machine. The crushing machine comprises a seat body, an outer casing part, a power driving part, an inertia driving part and an inner casing part, wherein the seat body is provided with an accommodation space; and a strut member is formed in the accommodation space and is provided with a spherical supporting frame. The outer casing part is arranged on the seat body and can move relative to the seat body; the outer casing part is provided with a base fixed on the seat body, an upper bearing frame arranged on the base as well as a first body arranged on the upper bearing frame; and the first body is provided with a crushing cavity. The power driving part is arranged on the strut member and is provided with a driving shaft arranged in the accommodation space and a driving wheel arranged on the driving shaft; the inertia driving part is arranged on the power driving part and is provided with a coupling fixed on the driving shaft, a positioning part arranged on the coupling, a shaft sleeve arranged in a linear sliding chute as well as a first elastic component; the positioning part is provided with the linear sliding chute; the shaft sleeve can do simple harmonic motion; the first elastic component props against the shaft sleeve; and the inner casing part is supported by the spherical supporting frame and deflects relative to the seat body through the inertia driving part. The inner casing part is eccentric relative to the driving shaft and is provided with a second body which is arranged on a shaft sleeve mandrel, is conical and is formed on the mandrel.