The invention belongs to a lining concrete construction trolley for a pedestrian crosswalk in a tunnel and a construction method thereof. The construction trolley includes a movement bottom bracket, adoor frame, a template assembly, a hydraulic lifting device and a wedge-shaped fixing block. A construction method includes the steps of making a lining concrete construction trolley for the pedestrian crosswalk according to the shape and size of the cross section of the to-be-constructed pedestrian crosswalk in the tunnel, wherein the peripheral shape and size of the template assembly is matchedwith the peripheral shape and size of the cross section of the pedestrian crosswalk in the tunnel; performing waterproof and drainage construction on a lining construction surface and steel bar construction on a lining; making the construction trolley in place; pouring concrete; removing formworks; moving the formworks and the like. The construction trolley can improve the construction efficiencyand quality, and has the advantages of a simple structure, high construction speed, good quality, low manufacturing and using cost, time and labor saving and high applicability.