Sampling frequency deviation value estimation method and device

The invention discloses a sampling frequency deviation value estimation method and device, relates to the field of digital communication, and aims to solve the problem that two frames of data are needed for current sampling frequency deviation value estimation. The sampling frequency deviation value estimation method comprises the following steps: acquiring a first preset number of continuous OFDM symbols at a receiving end of a communication system, and performing FFT calculation to obtain a frequency domain signal; extracting a second preset number of continuous effective subcarrier data from the frequency domain signal; calculating the phase difference of the second preset number of subcarrier data of adjacent symbols in the first preset number of OFDM symbols; and calculating a sampling frequency deviation value of the first preset number of OFDM symbols. The device for estimating the sampling frequency deviation value is used for executing the method for estimating the sampling frequency deviation value.