The invention belongs to the field of cold rolling, and provides a heavy type scrubbing machine. The heavy type scrubbing machine comprises a workbench, a drive unit arranged at one end of the workbench, a cooling unit arranged at the other end of the workbench, and a roller brush unit inserted in the cooling unit, wherein one end of the roller brush unit is connected to one end of the drive unit,and the roller brush unit is used for grinding a steel belt. When the drive unit works, the roller brush unit can be driven to work, and the cooling unit is used for lowering the temperature of the roller brush unit. Compared with the prior art, the heavy type scrubbing machine has the beneficial effects that a first brush roller mechanism and a second brush roller mechanism are eccentrically arranged, and upper-lower bristle interference and plate belt vibration in the scrubbing process are avoided; a first brush roller rod and a second brush roller rod can transversely move, and uniform grinding is guaranteed; the first roller brush mechanism and the second roller brush mechanism can move up and down, and it is guaranteed that after brush roller abrasion, automatic compensation can be conducted; and the cooling unit can cool the roller brush unit, friction and heat between roller brushes are reduced, and the service life of the roller brushes is prolonged.