According to the problem of Orthogonal Frequency Division Multiplexing（OFDM）systems are very sensitive to carrier frequency offset

we analyze the performance of decision feedback algorithm.By mathematical deduction the phase rotation value of adjacent symbol data in frequency domain

a Non-Data-Aided（NDA）method without the pilot signals is proposed for correct the Residual Frequency Offset（RFO）.The method correct the RFO for the received signal in time domain.The pilot subcarriers are not required to achieve high efficiency.Simulation results show that

the proposed algorithm can track the frequency offset effectively in multipath channel and the tracking range is 5% of the subcarrier space

which has high practical application value.