The utility model discloses a formula tunnel inner wall disease detection experiment dolly is shot to semi -automatic multi -angle for the shooting of tunnel model inner wall detects the sample, and it has the shooting support immediately to bear the weight of the face, shooing the support and having the pole setting, the index plate is put in the pole setting and can be followed it and slide from top to bottom through hookup frame cover, the index plate sets up the pinhole according to the central angle that according to actual need set for, take the cloud platform and insert the index plate hookup that cloud platform and index plate were taken in downthehole realization in through the central minor axis on it, take the cloud bench be provided with with the pinhole be used for with the mesopore pin joint of index plate. The setting is at the line scan camera who shoots the cloud bench for the tunnel inner wall formation of image of big visual field high accuracy. The utility model discloses reduce tunnel inner wall disease detection's working strength and the potential safety hazard that probably causes, realize detection full automatization in the tunnel, improved the benefit.