Underwater automatic detection and desilting device and method for ship lift bulkhead gate groove

The ship lift bulkhead gate groove underwater automatic detection and dredging device comprises a grabbing beam body, a walking track is arranged at the bottom end of the grabbing beam body, and hoist pulley blocks used for lifting the grabbing beam body are symmetrically arranged at the top of the grabbing beam body; guide pulley devices used for guiding door grooves are symmetrically installed at the tops of the two ends of the grabbing beam body. An automatic detection dredging device for dredging is mounted on the walking track; a hydraulic pump station for providing hydraulic power is arranged at the top of the grabbing beam body; a gas storage tank used for providing high-pressure gas is arranged on the side edge of the hydraulic pump station. The device can simultaneously realize the gate connection operation of the bridge hoist and the underwater detection and desilting functions of the gate slot, is quick and convenient to use, can be recycled, meets the special use requirements, can solve the faced