Water source sampler for water conservancy project

The utility model relates to a hydraulic engineering water source sampler which comprises an outer cylinder, a plurality of outer liquid inlet holes which are vertically distributed are formed in the peripheral side of the outer cylinder, an inner cylinder is sleeved with the outer cylinder, and a plurality of inner liquid inlet holes which are vertically distributed are formed in the upper peripheral side of the inner cylinder; a sealing layer is fixedly arranged on the inner wall of the outer cylinder; a plurality of middle liquid inlet holes which are vertically distributed are formed in the peripheral side of the sealing layer; the sealing layer is arranged between the outer cylinder and the inner cylinder to play a sealing role; the positions of the outer liquid inlet holes and the middle liquid inlet holes are in one-to-one correspondence; a rotating plate is arranged at the top of the inner cylinder; and the inner liquid inlet holes can be in one-to-one correspondence with the outer liquid inlet holes