The invention provides a CBD reaction deposition device and method for producing ZnS thin films continuously. The device comprises a reaction tank in which reaction pharmaceutical is stored. The reaction tank is formed by sequentially connecting a low-temperature-section CBD deposition tank and a high-temperature-section CBD deposition tank. The low-temperature-section CBD deposition tank and the high-temperature-section CBD deposition tank are each provided with a low-temperature-section mixing tank and a high-temperature-section mixing tank which circulate independently and communicate with circulating cooling water to control temperature of the reaction pharmaceutical. A cleaning tank and a drying tank are sequentially connected behind the high-temperature-section CBD deposition tank, and a thin film winding drum discharging roller cylinder and a thin film winding drum rolling roller cylinder are arranged before and behind the high-temperature-section CBD deposition tank correspondingly. The method comprises the steps that a substrate selected by a copper indium gallium selenium flexible thin film solar battery is prepared; reaction liquid is prepared; a polyimide thin film flexible substrate is conveyed to the upper portion of the CBD reaction tank through a conveying device; the low-temperature-section CBD reaction deposition tank and the high-temperature-section CBD reaction deposition tank circulate independently; the deposition substrate covers the CBD deposition tank, and a plating layer face makes contact with reaction liquid.