The invention discloses a micro-gas-bubble generating circulation system and a clothing treatment apparatus. The micro-gas-bubble generating circulation system comprises a dissolved gas tank, a waterpump, a water valve, a gas valve, a filtering assembly and a cavitation member, wherein water flow can completely dissolve air when the water flow flows through the dissolved gas tank, the dissolved gas tank has an inlet and an outlet, the outlet is connected to a taking-water position, the water pump is used for driving the water at the taking-water position to the dissolved gas tank, the water valve is arranged between the water pump and the taking-water position so as to control the water flowing toward the water pump, the gas valve is arranged between the water valve and the water pump soas to control the ventilation toward the water pump, the filtering assembly is arranged between the water valve and the dissolved gas tank so as to filter the water flowing into the dissolved gas tank, and the cavitation member is connected between the dissolved gas tank and the taking-water position, and prepares gas bubble from dissolved gas through cavitation effect. The micro-gas-bubble generating circulation system according to the embodiments of the present invention has the simple structure, and can efficiently, cyclically and continuously generate micro-gas-bubbles, and can further filter out dirt in the water during the cyclical generation of the micro-gas-bubbles so as to always maintain the clean system.