Underground water sampling machine for geological exploration

The utility model discloses an underground water sampling machine for geological exploration, which comprises an L-shaped fixed plate, a winding roll, a gear transmission mechanism, a sampling cylinder and a motor. When the water inlet formed in the movable disc and the stainless steel net body arranged on the fixed disc partially or completely coincide, water can flow into the sampling barrel through the water inlet, the sampling barrel can be closed by rotating the movable disc after sampling, the water is prevented from leaking or being polluted in the carrying process, the water is filtered through the stainless steel net body, and the water quality is improved. According to the underground water sampling device, the buffer pad is arranged at the bottom of the sampling cylinder, the buffer pad can safely protect the bottom of the sampling cylinder in the using process of the sampling cylinder, the bottom of the sampling cylinder is prevented from being damaged due to collision of hard objects in the under