Craning and transferring ballast water balance compensation control system for semi-submersible platform

The invention discloses a craning and transferring ballast water balance compensation control system for a semi-submersible platform. The system involves a ballast tank arranged on the semi-submersible platform and a compensation cabin connected to the ballast tank, wherein an input opening of the ballast tank is provided with a valve; a ballast water remote control panel is arranged in a cab of acrane, and the ballast water remote control panel is connected to a PLC control box; the PLC control box is connected to the valve and a liquid level sensor; the ballast water remote control panel isprovided with a button for controlling opening and closing of the valve and an indicator light for displaying opening and closing of the valve; and during operation, a ballast controller injects water which is not lighter than the weight of a heavy object into the compensation cabin according to the weight of the heavy object allocated and transported by the crane, and a driver of the crane controls the valve through the