Dynamic positioning method, device and equipment of semi-submersible ocean platform and medium

The embodiment of the invention discloses a dynamic positioning method, device and equipment for a semi-submersible ocean platform and a medium. The method comprises the steps that the real-time position of the platform is obtained; if the real-time position is different from the preset position, detecting external stress torque by using a first torque detector; calculating a first target thrust force which should be generated by each propeller, controlling the propellers to generate force according to the first target thrust moment, and detecting an actual thrust moment; if the actual thrust moment is different from the first target thrust moment, that is, the propellers have faults, the fault condition of each propeller is obtained; according to the fault condition, the external stress torque and a preset equation set, the thrust of each propeller, namely a second target thrust torque, is recalculated; and controlling each propeller to generate thrust according to the corresponding second target thrust mome