The utility model relates to the technical field of chemical production accessory devices, in particular to a workshop desulfurization liquid dosing system. The working intelligent degree is high, theworking efficiency is high, the use limitation is high, and the practicability is low; moreover, liquid overflow and gas leakage which are easily caused by no dosing method when equipment fails can be prevented, the adjustment process is simpler and more convenient, and the use safety is higher; the device comprises a pesticide box, a timing device, a sensor, a plugging valve, a threaded rod, a threaded pipe, a driving sprocket, a driven sprocket, a baffle, a servo motor and a chain, a working cavity is formed in the pesticide box, a feeding pipe and a discharging pipe are arranged on the left side wall and the right side wall of the pesticide box respectively, a transmission shaft is arranged at the output end of the servo motor, the chain is arranged on the driving chain wheel and the driven chain wheel in a sleeving mode, and a controller is arranged on the pesticide box. The device further comprises a driving motor, a transmission roller and an aeration device, the aeration deviceis installed on the side wall of the pesticide box, and a plurality of sets of flow guide plates are fixedly arranged on the transmission roller.