The invention discloses a finger wetting device capable of carrying out circulating disinfection. The finger wetting device comprises a box cover, a shield, a box body, a box cavity, a first rubber wheel, a second rubber wheel, a driven wheel and a water absorption transmission belt and is characterized in that a square hole and a through groove are formed in the box cover; a ferrule and a baffle are arranged on the box cover; a shield shaft is arranged at one end of the shield; a shield gear is fixed to the shield shaft; the box cavity is formed in the box body; first shaft grooves and second shaft grooves are formed in the walls of the box cavity; a first rubber wheel shaft is arranged in the first rubber wheel; the first rubber wheel shaft and the first rubber wheel are fixed together to form a whole body; a second rubber wheel shaft is arranged in the second rubber wheel; the second rubber wheel shaft and the second rubber wheel are fixed together to form a whole body; the driven wheel is arranged on the second rubber wheel shaft; and the water absorption transmission belt sleeves the first rubber wheel and the second rubber wheel. According to the finger wetting device, once the shield is opened and closed per time, a water dipping part appearing before a user is always soaked with disinfectant fluid, so that cleanness and sanitation can be ensured; and although multiple people use the finger wetting device simultaneously, fingers can also be prevented from being contaminated by bacteria by frequently opening and closing the shield.