The invention relates to an integrated assembling tool for automobile front and rear door split type hinges. The integrated assembling tool for the automobile front and rear door split type hinges is characterized in that the tool comprises a connecting support (1), at least four assembling units (2) and positioning mechanisms. The assembling units are disposed on the connecting support (1). Each assembling unit (2) positions a lower hinge plate (5). The connecting support (1) with the assembling units (2) and an automobile body (6) are assembled together through automobile body limiting blocks (25) on the assembling units (2) and the positioning mechanisms. The positioning mechanisms include the main positioning mechanism (3) and the auxiliary positioning mechanism (4). The main positioning mechanism (3) limits freedom degree of the front end of the assembling tool in the left-right direction and the vertical direction. The auxiliary positioning mechanism (4) limits the freedom degree of the rear end of the assembling tool in the vertical direction. The automobile body limiting blocks (25) limit the freedom degree of the assembling tool in the front-back direction. By means of the integrated assembling tool for the automobile front and rear door split type hinges, positioning is accurate, the floor space is small, the cost is low, and the lower hinge plates of front and rear doors on the same side of an automobile are synchronously assembled on the automobile body.