Combined transformer bobbin

The utility model discloses a combined transformer bobbin which comprises a cylindrical bobbin, wherein a through hole is formed in the middle part of the bobbin; a plurality of winding clamping seats are arranged on a cylindrical body of the bobbin. The combined transformer bobbin also comprises a pair of U-shaped magnetic cores arranged at the left and right ends of the bobbin in a matched way and a pair of combined shells arranged at the upper and lower ends of the bobbin in the matched way, wherein a plurality of clamping structures matched with the winding clamping seats are arranged on the middle parts of the combined shells. According to the combined transformer bobbin, the power of a transformer is maximized under the condition of the same size, so that characteristics of the transformer are maximally utilized.