Sampler capable of adjusting sampling depth

The utility model discloses a sampler capable of adjusting sampling depth, which comprises a mounting rack, the upper surface of the mounting rack is fixedly connected with a motor seat, the upper surface of the motor seat is provided with a double-end motor, and two output ends of the double-end motor are fixedly connected with stranding shafts. Through the arrangement of the mounting frame, the double-end motor, the stranding shaft, the sampling rope, the sampling barrel, a supporting disc, a supporting spring, a pull rod, a first sealing conical hole, a second sealing conical hole, a first sealing conical head, a second sealing conical head, a second hanging ring and a pull rope, the double-end motor can work to drive the stranding shaft to rotate, and take-up and pay-off of the sampling rope are achieved; and through cooperation of a pull rope and a second hanging ring, a pull rod is pulled, a first sealing conical head and a second sealing conical head move upwards, the sealing state of the sampling barr