The invention discloses a circulating-type multistage deposition light-cured spray paint aerosol processing device. The circulating-type multistage deposition light-cured spray paint aerosol processing device comprises a primary water rotation device; the primary water rotation device comprises an installation housing; an inclined pipe, a multi-layer water tank, and a circular mist inlet pipe arearranged at the right side bottom end, the internal bottom end, and the top end of the installation housing respectively; a first blower fan and a first motor are arranged in the circular mist inlet pipe; the first motor is connected with a water mist mixing rotary mechanism; a suction fan, inclined guide plates, and an active carbon plate are arranged on the top end, the internal wall, and the internal right end of the inclined pipe respectively; the primary water rotation device is capable of realizing high speed rotating and mixing of water with paint mist, so that the absorption volume ofmist absorbed and purified by water is increased, water saving is realized; the primary water rotation device is used for primary purifying and absorbing of paint mist, the active carbon plate is usedfor secondary purifying of paint mist, and UV lamps are used for tertiary purifying and deposition spraying, so that the harmful substances in paint mist are removed greatly, paint mist purifying degree is high, and environment protection is realized.