The invention discloses a remote-control submerged underwater desilting vehicle, which comprises a vehicle frame and a walking mechanism; a mud cleaning working mechanism is arranged at the front end of the vehicle frame, and a sealed cabin is arranged at the rear end of the vehicle frame; the mud cleaning working mechanism comprises a mud pump with an output port connected with a mud discharging pipe; a driving motor, a transmission device and a power take-off device are arranged in the sealed cabin; the driving motor is used for driving the walking mechanism through the transmission device and the power take-off device; the desilting vehicle further comprises a main controller which comprises a radio signal transmitting device which is communicated with a remote control device, the remote-control submerged underwater desilting vehicle further comprises a float which is fixed relatively to the vehicle frame; the float is connected with an air pump through a gas piping; the gas pipe is provided with a three-position steering valve which is used for feeding the water and discharging the gas for the float, or feeding the gas and discharging the water or neither feeding the gas nor feeding the water; the mud pump, the driving motor and the air pump are respectively connected with the main controller and are controlled by the main controller. The desilting vehicle is simple in structure, convenient to use, high in desilting efficiency and low in construction cost; the working depth is greater than 5m. The desilting vehicle is suitable for the complex underwater environment, and is applicable to the industrial circulating cooling water settling pond, the channel, the conduit and the like.