The invention discloses a frequency offset estimation method. The method comprises the following steps of: adding a positive reference frequency offset and a negative reference frequency offset into a local reference symbol for frequency offset estimation; and performing frequency offset estimation according to a received reference symbol and the local reference symbol into which the positive reference frequency offset and the negative reference frequency offset are added. The invention also discloses a frequency offset estimation device which comprises a positive and negative frequency offset adding unit and a frequency offset estimating unit connected with each other, wherein the positive and negative frequency offset adding unit is used for adding a positive reference frequency offset and a negative reference frequency offset into a local reference symbol for frequency offset estimation; and the frequency offset estimating unit is used for performing frequency offset estimation according to a received reference symbol and the local reference symbol into which the positive reference frequency offset and the negative reference frequency offset are added. By adopting the method and the device, the frequency offset estimation complexity can be lowered, the anti-jamming capability of frequency offset estimation is enhanced, and the accuracy of frequency offset estimation can be enhanced.