A cleaning brush assembly includes a control handle, an extension pipe mounted on a second end of the control handle, a angle adjustable pipe module mounted on the extension pipe, and a cleaning portion mounted on the angle adjustable pipe module. The control handle includes a connecting member, a control seat, a control shaft, a switch member, and a control valve. Thus, the cleaning water is introduced into the primary flow channel for flushing use and can also be mixed with the detergent in the primary flow channel for cleaning use by rotation of the control valve, thereby facilitating a user operating cleaning brush assembly.