The present invention discloses a delay line type surface acoustic wave sensor array comprising at least two delay line type surface acoustic wave sensors. Each delay line type surface acoustic wave sensor comprises a piezoelectric substrate; an interdigital energy transducer arranged on the piezoelectric substrate; and a reflective grating group arranged on the piezoelectric substrate and positioned on one side of the interdigital energy transducer. A first spacing is arranged between the reflective grating group and the interdigital energy transducer. The first spacings of any two delay line type surface acoustic wave sensors are not equal. The piezoelectric substrates and the reflective grating groups of any two delay line type surface acoustic wave sensors are the same. According to the technical scheme of the invention, the parallel sensing (sensitive) is realized. Meanwhile, the advantages of fast reading speed and simple calibration are realized. In addition, the time delay information of reflective gratings in all delay line type surface acoustic wave sensors of the array serves as references for each other, so that the interference of the space environment is effectively eliminated. The anti-interference capability is greatly improved.