The invention relates to a wave division multi channel optical fiber grating geophone applied in geophysical seismic exploration. The technical scheme provides a multi channel geophone which is composed of a photoelectric acquisition station, an armored optical fiber and a plurality of optical fiber grating geophones, wherein the photoelectric acquisition station and each geophone are connected integrally via the armored optical fiber of a preset length, the optical fiber is only welded or connected in the photoelectric acquisition station and the optical fiber grating geophones, an optical fiber terminal or an optical fiber adaptor without connection are provided externally. The invention has the advantages of high sensitivity, low nonlinear distortion and electromagnetic interference resistance and the like, and the invention eliminates the inter-channel interference of the signals between lines, can reduce the error caused by line loss, simplify wild operation, reduce uncertain random error, improve exploration quality, reduce the number and labor strength of unreeling workers in seismic exploration.