The invention provides a movable bottom formwork trolley system suitable for a large concrete prefabricated component. The movable bottom formwork trolley system comprises multiple movable bottom formwork trolleys and multiple H-bars. A locating groove is formed between the adjacent H-bars. The movable bottom formwork trolleys are arranged in the locating grooves. Each movable bottom formwork trolley comprises multiple bottom formwork trolley units which are connected in series and at least one bottom formwork steel plate with the surface coated with release agent, wherein the bottom formwork steel plates are independent of the bottom formwork trolley units. Each bottom formwork trolley unit comprises multiple sets of bearing devices, multiple pairs of traveling wheels and a formwork lifting device. The formwork lifting devices are connected with the bearing devices, located below the bottom formwork steel plates and used for lifting or descending the bottom formwork steel plates, so that in concrete pouring process, the top surfaces of the bottom formwork steel plates and the top surfaces of wing plates of the H-bars are located on the same plane, and therefore a bottom formwork plate of the large concrete component can be formed. Through different splicing combinations, the prefabricated bottom formworks can be formed for the large concrete prefabricated component of different types and sizes, the bottom formwork can be quick spliced and detached and also can be used for transfer of the component is also considered.