An automatic moisture-resistant feeder having a set feeding time and amount comprises a container (1), a feeding device (2), and a control device (3). The feeding device (2) comprises a motor (21), a worm screw (22), a sleeve (23), a screw (24), a plunger (25), and an elastic member (26). The sleeve (23) is slidably mounted in the container (1), sleeved on the outer circumference of the worm screw (22), and drivingly connected to the worm screw (22) by a thread. The screw (24) is slidably mounted in the container (1) and on the worm screw (22), and the screw (24) is driven by the worm screw (22) to rotate. The sleeve (23) makes contact with the screw (24). When the worm screw (22) is rotated, the screw (24) is driven to rotate and the sleeve (23) is driven to slide by the worm screw (22), and the screw (24) is pushed to slide by the sleeve (23) . The screw (24) is provided below a feeding port (111), and communicates with the feeding port (111). An outer surface of the screw (24) is provided with a helical feed slot (242) for accommodating feed. The plunger (25) is slidably mounted in the container (1) to open or close a feed discharging port (12). The plunger (25) and another end of the screw (24) are pressed together and the elastic member (26) presses the plunger (25), such that the feed discharging port (12) tends to remain closed. The motor (21) is electrically connected to the control device (3). The invention has the advantageous effects of a simple structure, dispensing a precise feeding amount, and preventing feed from getting wet.L'invention concerne un dispositif d'alimentation automatique résistant à l'humidité ayant une durée et une quantité d'alimentation définies qui comprend un récipient (1), un dispositif d'alimentation (2), et un dispositif de commande (3). Le dispositif d'alimentation (2) comprend un moteur (21), une vis sans fin (22), une gaine (23), une vis (24), un piston (25) et un élément élastique (26). La gaine (23) est montée avec faculté
