The invention relates to the field of painting, coating and corrosion resisting, in particular to a versatile coating brush. The versatile coating brush comprises a brush handle, a brush head and a brush handle cover, wherein the brush head and the brush handle cover are connected to the two ends of the brush handle respectively. The brush head can be in an arc shape or a circular shape, and the radian of the arc-shaped brush head can be controlled, so that bristles are attached to the surface of a painted (coated) column; the containing angle of the brush head ranges from 0 degree to 120 degrees, the reference is the fact the bristles are tightly attached to the surface of the painted column, outer-gap leakage flowing and splattered painting which are generated when the column is paintedwith a flat plate brush are solved, a coating is saved, and the environment is prevented from being polluted. A coating storage cavity is formed inside the brush handle, so that coating dripping in the coating dipping process is reduced, labor intensity is reduced, and it may be said that materials, time and labor are saved. The versatile coating brush can also be externally connected with an automatic coating conveying device, the coating can be charged while being used, and a quiet convenient effect is achieved when on-site continuous large-area construction and the use quantity of the coating is large. The versatile coating brush is easy and convenient to install and operate, safe, flexible and reliable, raw materials are saved, and the environment is not polluted; economic benefits arehigh, the application range is wide, and industrialization prospects are good.