Lateral slope should be considered in the positioning of tunnel secondary lining trolley. According to relevant public information, in the secondary lining of tunnel, in order to ensure that the gap between blocks is small enough, it is necessary to use positioning trolley to accurately locate the blocks. If the cross slope is not considered when the trolley is positioned, the block position will be inaccurate, and even dislocation will occur, thus affecting the quality and safety of the secondary lining. Therefore, the positioning of tunnel secondary lining trolley needs to consider the transverse slope.