The invention discloses a dispersion machine for a coating. The dispersion machine comprises a machine head (1), wherein the machine head (1) is integrally of a rectangular-parallelepiped box-shaped structure of which the bottom is provided with an opening; the open end of the bottom of the rectangular-parallelepiped box-shaped structure is provided with a bottom cover (2); the lower bottom surface of the bottom cover (2) is provided with one boss (3) which downwards protrudes; the outer side of the machine head (1) is provided with a driving motor (4); a rotating shaft (8) of the driving motor (4) extends into the machine head (1); the rotating shaft (8) is fixedly arranged on the machine head (1) through a first bearing block (5) and a second bearing block (7); the rotating shaft (8) is provided with a driving gear (6); two sides of the rotating shaft (8) are provided with a driven shaft (9) in a mirror-image manner; two ends of the driven shaft (9) are fixedly arranged on the inner wall of the machine head (1) through the bearing blocks respectively. By using the dispersion machine for the coating, an action of alternately ramming a material can be realized through two material ramming rods; the work efficiency of the coating in a dispersion process is greatly improved.