The utility model relates to a combined post insulators structure superposes, including a plurality of sections post insulators (1) and a plurality of connecting piece (2), every connecting piece (2)including horizontally connect part (21) and coupling part (22) perpendicularly, post insulators (1) through horizontally connect part (21) parallel connection insulator set layer, constitutes the multilayer formula prop structure that insulates by a plurality of insulator set layer through perpendicular coupling part (22) series connection. The utility model discloses can solve current serial -type post insulators structure bending resistance and the weak problem of fatigue strength, have the characteristics that bending resistance and fatigue strength are big. Not only can promote post insulators's mechanical properties, reduce the displacement volume under earthquake of post insulators top and the strong wind operating mode, still be favorable to link fitting's design, promote equipmentoperational reliability simultaneously.