The utility model particularly relates to a system for be used for transportation prefabricated component in subway station, its characterized in that: the system includes portal crane device and portable jack, the portal crane device includes portal crane track and portal crane, the portal crane track sets up in the medium plate bottom surface of subway station, portal crane sliding fit connect in the portal crane track, portable jack by the flatbed with set up that a plurality of support piece constitute on the flat board, portable jack with the portal crane constitutes synchronous motion. The utility model has the advantages of: this conveyor system simple structure, transport means is convenient, practices thrift manpower and time cost, has solved in the station prefabricated componenttransportation and has assembled and wait difficult problem, has provided the transportation, has installed the support for prefabricated assembling in the subway station.