The invention discloses a progressive feeding and automatic clamping combined wood sawing and splitting device. The device comprises a workbench and a motor, a progressive feeding mechanism, a wood sawing mechanism, a conveying turning mechanism and a splitting mechanism are arranged on the workbench, the progressive feeding mechanism comprises a U-shaped support, a hinge is arranged at the upper portion of the rear end of the U-shaped support, a hook-shaped feeding mechanism is arranged on the hinge, a first hydraulic rod is arranged between the rear portion of the hook-shaped feeding mechanism and the U-shaped support, a plurality of storage protruding blocks are arranged at the upper portions of the front end and the rear end of the U-shaped support in a matrix manner, supporting transverse rods are arranged at the left end and the right end of the inner bottom of the U-shaped support, and supporting columns are arranged on the supporting transverse rods. An L-shaped rotating rod is arranged in the top ends of the supporting columns, automatic clamping and fixing are achieved, wood is sawn, a semi-automatic manual wood sawing manner is replaced, manual operation is omitted, man-machine separation is achieved, the personal safety of workers is guaranteed, time and labor are saved, and automatic wood sawing operation does not need to consume manpower.