The invention discloses a signal processing method for an OFDM radar communication integrated fixed platform system. The signal processing method mainly solves the problems that in the prior art, communication data has a high bit error rate, a restored integrated pulse reference signal has large error, and the pulse compression processing effect is poor. The signal processing method comprises theimplementation steps that 1, an echo signal condition is set; 2, down-conversion processing and sampling processing are performed on an echo signal to obtain a processed baseband signal, and a cyclicprefix of the signal is removed; 3, the signal after removing the cyclic prefix is subjected to Fourier transform; 4, the signal after Fourier transform is decoded and judged to obtain communication information; 5, the communication information is encoded and modulated to obtain a reference signal; and 6, the reference signal is used for performing pulse compression processing on the signal of which the cyclic prefix is removed. The signal processing method has the advantages of low bit error rate of the communication data and good pulse compression processing effect, and can be used for the OFDM radar communication integrated fixed platform system.