Retractable multifunctional cleaning brush

The utility model relates to a retractable multifunctional cleaning brush, comprising a brush head, a brush rod and a brush handle which are successively connected in a threaded manner. The brush head, the brush rod and the brush handle are mutually communicated, bristles on the brush head are circularly arrayed in a scattered manner, water outlet holes are arranged among the bristles, the water outlet holes and the bristles are arrayed in a staggered manner, the brush rod is a retractable rod, and a control switch which controls opening and closing of a through hole is arranged on the brush handle. Brush heads in different sizes can be arranged on the brush, the brush rod is the retractable rod, the brush heads in different sizes can be arranged on the brush according to different cleaned objects, and the length of the brush rod can be adjusted. Cleaning fluid or disinfectant is filled in the brush handle. After the switch is switched on, fluid can flow out from the brush head, and then the brush can be used for cleaning or sterilizing. The cleaning fluid or disinfectant can be filled in the brush handle, so that cleaning and sterilizing are completed at one step; the brush is cleaned conveniently, and can be used for sufficiently cleaning or sterilizing various surfaces of a cleaned object and even dead corners of the cleaned object; and the cleaning fluid or disinfectant is used economically, and the retractable multifunctional cleaning brush is convenient in use.