The invention discloses a fine symbol synchronization algorithm being free from frequency offset interference. The problems of the synchronization algorithm in the prior art that the accuracy is low and the requirement of modulation order development is not met because the synchronization algorithm is influenced by a residual frequency offset error are solved. The fine symbol synchronization algorithm being free from frequency offset interference comprises the following steps: performing one-bit delaying treatment on received data and a local pilot sequence and performing the correlated calculation; performing cyclic shift on a result of the correlated calculation and performing the summation calculation; performing normalization treatment on the result of the summation calculation; and setting a position of a maximum value obtained from the calculation as a fine synchronization position. According to the scheme, the fine symbol synchronization algorithm achieves the purposes of eliminating synchronous frequency offset, increasing system stability and causing a system to work under a smaller residual error environment and has higher practical value and promotional value.