Adjustable coating roller brush

The utility model relates to a brush, in particular to an adjustable coating roller brush. According to the adjustable coating roller brush, the length of the roller brush can be adaptively adjusted according to use requirements, meanwhile, the situation that paint is splashed can be effectively avoided, and the angle can be adaptively adjusted according to roller coating requirements. An adjustable coating roller brush comprises a bottom frame, a first branch pipe and a second branch pipe, the first branch pipe is fixedly connected to the top end of the bottom frame, the second branch pipe is arranged in the first branch pipe in a sliding mode, the adjustable coating roller brush further comprises an adjusting rod mechanism and a fixing rod mechanism, the adjusting rod mechanism is arranged on the second branch pipe in a sliding mode, and the fixing rod mechanism is rotationally arranged on the upper portion of the adjusting rod mechanism. The adjusting rod mechanism is in contact fit with the second branch