The wireless remote control grab solves the difficulties of low working efficiency and high operating tensity when using single cable mechanical grab on single hook crane, especially suitable for Marine crane and single hook type crane on wharf, no cable is needed, the device is equipped with lithium battery to supply power for the remote control system and solenoid valve, and the service time of full power is more than 72 hours; It is reliable, easy to operate and low maintenance cost. Wireless remote control can be used to open and unload the material at any position in the air.