The invention relates to a dual purpose large generating turning wheel unit for wind and wave. The dual purpose large generating turning wheel unit is mainly used for developing and utilizing pure wind energy in nature and water wave energy and wind and wave mixing energy greater than the pure wind energy. The dual purpose large generating turning wheel unit is used for realizing a large or extremely large power generating unit for a single machine. The dual purpose large generating turning wheel unit is technically characterized in that firstly, telescopic blades are designed, so that a blade folding technology is realized, and the problem that an existing fan blade machine is technically restricted and cannot be made into a large machine is solved; secondly, self-telescopic multi-blade turning wheels and an auxiliary blade shrinking device are designed, so that an automatic telescoping function for blades is realized, negative effects are greatly reduced, and the avoiding rate reaches five sixths; thirdly, a surpassing transmission ratchet mechanism is designed, so that the problem that different functions of folding and unfolding are needed when two turning wheel machines work simultaneously or respectively is solved, the transferring of power is guaranteed, and the technical requirements of the large or extremely large power generating unit for the single machine are met; fourthly, a floating platform and an automatic tracking mechanism for wind and wave are additionally designed, so that water floating and automatic wind and wave tracking for the generating running wheel unit are realized. The dual purpose large generating turning wheel unit is used for achieving low-carbon environmental protection and generating more electricity for our country.