The utility model discloses a grabbing device of a crane. The manipulator comprises a bracket, and an electric cylinder and a gripping device which are arranged on the bracket, at least two sets of grabbing devices which are symmetrically distributed relative to the center of the support are arranged in the length direction of the support. Each grabbing device at least comprises two rotary clamping hands which are symmetrically arranged in the width direction of the support, the rotary clamping hands are hinged to the support, an electric cylinder is in transmission connection with the rotaryclamping hands, and the electric cylinder drives the rotary clamping hands to rotate so as to clamp and grab objects. The electric cylinder drives the grabbing device to grab the ceramic tile iron support through the electric cylinder and the grabbing device which are arranged on the support, the structure is simple, the size is small, the operation speed is high, the space utilization rate is large, control is accurate, the iron support used for containing ceramic tiles is clamped in a full-automatic mode, and a powerful guarantee is provided for full-automatic intelligent storage. The electric cylinder is a guide rod type electric cylinder, guiding is convenient and reliable, a guide rail sliding block and other mechanisms do not need to be arranged, the mechanism structure is simplified, and installation is more convenient and faster.