Collecting device

The utility model relates to a collecting device which comprises a connecting plate and an adjusting assembly arranged on the outer side of the connecting plate. The adjusting assembly comprises a sliding rod, an adjusting block, a lead screw and a fixing plate. Four sliding grooves are symmetrically formed in the connecting plate, sliding rods are slidably connected into the sliding grooves, baffles are fixedly connected between the sides, close to each other, of every two corresponding sliding rods, steps used in cooperation with the baffles are arranged in the sliding grooves, and adjusting blocks are fixedly connected between every two corresponding sliding rods. The underground water sampling device has the beneficial effects that through the technical means, the problems that the gravity center of a traditional underground water sampling device cannot be adjusted according to a complex environment in a mountain forest, the gravity center is unstable and easily topples over, and a filter screen cannot be