A dry-cleaning brush includes a body, a base plate and a bristle component. A storage cavity used for storing shampoo powder is formed between the body and the base plate. A powdering device is arranged in the storage cavity and includes a pressing rod arranged on the base plate, lever assemblies, pistons, and at least one leaking hole formed in the base plate, and the pistons are located at openings of the leaking holes. Each lever assembly includes a lever having two ends respectively clamped on the pressing rod and the corresponding piston. A rebound mechanism is arranged between an elastic gland, the pressing rod and the base plate. The powdering device controls the pistons based on the lever principle, the elastic gland and the pressing rod are pressed to drive the levers to pull the pistons away from the leaking holes.
