The invention belongs to the technical field of offshore wind power, and particularly relates to an offshore wind plant operation and maintenance based wind integrated forecasting method. The offshorewind plant operation and maintenance based wind integrated forecasting method includes a screw blade, a mounting frame, a motor, a rotary shaft, a bevel gear I, a bevel gear II, a rotary rod and a speed control tube, wherein the mounting frame is arranged at the right end of the screw blade, a mounting plate is in sliding connection above the inner part of the mounting frame; the lower end of themounting frame is fixedly connected to the upper end of a supporting rod; the lower end of the supporting rod is fixedly connected with a balance frame; the lower side of the left end of the mountingplate is fixedly connected with the speed control tube; a spiral slot is formed inside the speed control tube; a rotary shaft is rotatably mounted in the spiral slot; blocking blocks are symmetrically and elastically connected in upper and lower walls of the left end of the rotary shaft through springs; the outer surface of the middle part of the rotary shaft is fixedly connected with the bevel gear I; and the right end of the rotary shaft is rotatably connected to the left end of the motor. The offshore wind plant operation and maintenance based wind integrated forecasting method is mainly used for solving the problem that the motor inside is excessively heated to catch fire as rotation speed of the screw blade is too quick while offshore wind power of an offshore wind plant in the priorart is relatively great.