The invention discloses an intelligent tunnel crack matching detection method. The method comprises the following steps: carrying out ID numbering on each extracted crack region; then extracting a crack characteristic value in the crack area; establishing a tunnel fracture database, secondly, preprocessing the acquired tunnel crack picture; performing crack detection on the picture B to obtain coordinates of a crack area; carrying out rapid positioning and feature value extraction on the crack area through a crack matching network to obtain a feature value vector; comparing the characteristicvalue vector with the crack characteristic value corresponding to each ID number in the database, confirming the ID number of the output characteristic value, finally, extracting and storing the crackbinary image and the crack width of the C crack area in the database together with the ID number, to complete matching detection of the tunnel cracks. The method has the characteristics of high matching efficiency and good matching accuracy.