Automatically timed water sampling device

The invention relates to an automatically timed water sampling device. The automatically timed water sampling device is provided with a sampling box (1). A sampling bottle (2) and a water distributor are arranged in the sampling box (1). The water distributor consists of an upper disc (3) and a lower disc (4) which have the same diameter and assembled by a hollow axle pipe (5); the lower disc (4) is fixed, a plurality of lower disc holes (6) are arranged at the inner peripheral edge of the lower disc (4), the number of the lower disc holes (6) is equal to the required water sampling times, and the lower disc holes (6) are connected with the sampling bottle (2) through hoses (7) and correspond to the hoses one by one; an upper disc hole (8) is arranged on the upper disc (3), the position of the upper disc hole (8) corresponds to one of the lower disc holes (6), the upper disc hole (8) is connected with a water pump (12) through a hard pipe (9), a rotary tap (10), the hollow axle pipe (5) and a water feeding pipe (11); a tooth (13) is arranged on the periphery of the upper disc (3) and meshes with a driving gear (15) of a stepping motor (14), so that the upper disc (3) is driven to rotate around the hollow axle pipe (5) by the stepping motor (14). The automatically timed water sampling device is accurate in sampling time and meets work requirements.