Long-span subway station main structure constructed based on column and arch method

The utility model discloses a long-span subway station main structure constructed based on a column and arch method. The long-span subway station main structure comprises a station internal main structure formed through excavation, a plurality of middle columns, middle plates and a main body arch portion, wherein the middle columns are arranged on the longitudinal center line of the station internal main structure in forth and back mode, and the middle plates are arranged in the middle portions of the middle columns. The main body arch structure is arranged right above the station internal main structure. Bottom longitudinal beams are arranged on the bottom of the station internal main structure, and top longitudinal beams are arranged in the middle of the main body arch portion. A middle longitudinal beam parallel to the bottom longitudinal beams is arranged between the middle portions of the two adjacent middle columns back and forth. Bottom plates and side walls of the station internal main structure are respectively provided with a secondary lining structure of the station internal main structure. The long-span subway station main structure has the advantages of being reasonable in structural design, stable in structure, good in use effect, simple in construction procedure, small in construction difficulty, fast in construction schedule, and capable of solving the problems of more excavated pilot tunnels and procedures, complex support, and large abandoned project amount, and construction quality is difficult to guarantee, and other various practical problems in the existing construction method of a subway station.