According to the intelligent tunnel pipeline detection vehicle, one set of lifting device is used for adjusting the four sets of caterpillar bands, the caterpillar bands are made to adapt to maintenance pipelines with different hole diameters, the hole diameter adjusting device is used for tightening and constraining cable sets in the pipelines at the advancing section of the shell, and when cableclamping needs to be conducted, by means of buckling of upper-layer U-shaped buckles in the cable clamping device and cooperation of ratchets and pawls in the U-shaped buckles, clamping work is achieved, constraint and clamping of cables are achieved, protection of the cables is achieved, the maintenance work of lines in pipelines is replaced with manpower, the cables scattered in the pipelines are collected and clamped, the detection vehicle guarantees the service life of the cable, facilitates the centralized detection of a line, improves the detection efficiency and precision, is suitablefor pipelines with different hole diameters, is wide in applicability, is high in automation degree, and is suitable for popularization and application.