The invention provides a test-tube brush for a chemical experiment in a senior middle school and belongs to the technical field of chemical experiment containers. For solving the problem that an existing product cannot clean the inner wall and the outer wall of a tubular container simultaneously, a brush handle is fixed to the upper end of a linkage device, a micro motor is arranged in the brush handle, the outer end of the micro motor is connected with an inner brush head through a rotary shaft, and the inner brush head is of a cylindrical structure. An outer brush head is fixedly installed at the lower end of the linkage device and is of a cylindrical structure, and the inner brush head is located in the outer brush head. The test-tube brush for the chemical experiment in the senior middle school can simultaneously clean the outer wall and the inner wall of the tubular container for the chemical experiment.