Efficient and high-precision underwater foundation bed desilting method

The invention provides an efficient and high-precision underwater foundation bed desilting method. The efficient and high-precision underwater foundation bed desilting method comprises the following steps that S1, a floating platform is driven to move to a to-be-cleaned area; S2, a desilting pipe and a sludge discharging pipe are started to work; S3, after desilting work of the to-be-cleaned area in the step S1 is completed, the floating platform is driven to move to a next to-be-cleaned area; S4, sludge at the bottom of a foundation bed is pumped into a hopper barge to be stored; and S5, after the hopper barge to be transferred and stored is full, the hopper barge is transported to a designed position to be put in. The efficient and high-precision underwater foundation bed desilting method achieves the purposes of lower cost, simpler operation, high efficiency and high precision, the problems that existing underwater foundation bed desilting is high in cost, low in efficiency and poor in precision are solved