A heterogeneous tube bundle group heat transfer structure, comprising: a plurality of symmetrical bi-wing longitudinal curved finned tubes; and a plurality of symmetrical bi-wing longitudinal plate finned tubes; characterized in that each of the plurality of symmetrical bi-wing longitudinal curved finned tubes comprises a first bare tube, and bi-wing longitudinal curved fins are symmetrically provided along an axis of a vertical section of the first bare tube; each of the plurality of symmetrical bi-wing longitudinal plate finned tubes comprises a second bare tube, and longitudinal flat steels are symmetrically provided along an axis of a vertical section of the second bare tube; the plurality of symmetrical bi-wing longitudinal curved finned tubes and the plurality of symmetrical bi-wing longitudinal plate finned tubes are alternately arranged in at least two rows; tubes adjacent to a symmetrical bi-wing longitudinal curved finned tube inside a tube bundle group are both a symmetrical bi-wing longitudinal plate finned tube; and an end of each row of the tube bundle group is provided with the symmetrical bi-wing longitudinal curved finned tube or the symmetrical bi-wing longitudinal plate finned tube; and fins of adjacent two symmetrical bi-wing longitudinal curved finned tubes are configured to surround the symmetrical bi-wing longitudinal plate finned tubes therebetween; a gap is provided between a symmetrical bi-wing longitudinal curved finned tube and a symmetrical bi-wing longitudinal plate finned tube adjacent thereto to be configured as a flue gas flow channel to enhance convective heat transfer; along a flue gas flow direction, every four tubes form a hexagonal prism-shaped space, wherein the hexagonal prism-shaped space is surrounded by two longitudinal curved fin back arc segments consisting of AB segment and DE segment, two longitudinal plate fin straight segments consisting of BC segment and EF segment, and two longitudinal bare tube arc segments consisting of CD segment and FA segment; and the hexagonal prism-shaped space has a flue gas inlet and a flue gas outlet. a plurality of symmetrical bi-wing longitudinal curved finned tubes; and a plurality of symmetrical bi-wing longitudinal plate finned tubes; characterized in that each of the plurality of symmetrical bi-wing longitudinal curved finned tubes comprises a first bare tube, and bi-wing longitudinal curved fins are symmetrically provided along an axis of a vertical section of the first bare tube; each of the plurality of symmetrical bi-wing longitudinal plate finned tubes comprises a second bare tube, and longitudinal flat steels are symmetrically provided along an axis of a vertical section of the second bare tube; the plurality of symmetrical bi-wing longitudinal curved finned tubes and the plurality of symmetrical bi-wing longitudinal plate finned tubes are alternately arranged in at least two rows; tubes adjacent to a symmetrical bi-wing longitudinal curved finned tube inside a tube bundle group are both a symmetrical bi-wing longitudinal plate finned tube; and an end of each row of the tube bundle group is provided with the symmetrical bi-wing longitudinal curved finned tube or the symmetrical bi-wing longitudinal plate finned tube; and fins of adjacent two symmetrical bi-wing longitudinal curved finned tubes are configured to surround the symmetrical bi-wing longitudinal plate finned tubes therebetween; a gap is provided between a symmetrical bi-wing longitudinal curved finned tube and a symmetrical bi-wing longitudinal plate finned tube adjacent thereto to be configured as a flue gas flow channel to enhance convective heat transfer; along a flue gas flow direction, every four tubes form a hexagonal prism-shaped space, wherein the hexagonal prism-shaped space is surrounded by two longitudinal curved fin back arc segments consisting of AB segment and DE segment, two longitudinal plate fin straight segments consisting of BC segment and EF segment, and two longitudinal bare tube arc segments consisting of CD segment and FA segment; and the hexagonal prism-shaped space has a flue gas inlet and a flue gas outlet.