The invention discloses a parallel combined type supporting head. The parallel combined type supporting head comprises a plurality of supporting units and connecting pieces, wherein the connecting pieces are arranged between the adjacent supporting units, are connected with the supporting units and are used for adjusting the distance between the supporting units; each supporting unit comprises a jack, a rack A, a rack B, a supporting plate and a transmission piece, wherein the transmission piece comprises a gear A, a planetary gear set, an inner gear ring A and a gear B, the planetary gear setcomprises a sun gear and a plurality of planetary gears, the sun gear is meshed with the planetary gears, the sun gear is connected with the gear A, the planetary gears are meshed with the inner gearring A and are rotationally connected with the inner gear ring A, and the end surface of the gear B is connected with the inner gear ring A; a piston rod A of the jack is connected with the rack A, the rack A is meshed with the gear A, and the rack B is meshed with the gear B and is connected with the supporting plate at the same time; and through the transmission of the planetary gear set, the torque of the jack is amplified, the connecting pieces are arranged, so that the plurality of supporting units can be connected, and the supporting strength is improved.