The invention relates to the technical field of tunnel construction, and provides a method for integrally and transversely moving a high and large formwork through a high and large trolley. The method comprises the following steps: the formwork is connected through a partial loading beam and a fixing clamp on the trolley; the formwork is controlled to be upwards or downwards adjusted through a longitudinal adjustment pull rod on the trolley; the distance between the formwork and the wall surface of a wall body is adjusted through a horizontal adjustment rod on the trolley; the trolley is moved through a sliding rail after pouring is completed; the trolley drives the formwork to integrally move to a second section. According to the method, after one pouring operation is completed, all needed is to loosen the formwork and move the trolley to a next pouring section to perform formwork mounting, and the problem that quantity of work is high because the formwork is required to be dismounted and is assembled again in the prior art is solved.