The invention belongs to the technical field of press-fitting tool products and concretely discloses a pneumatic press-fitting tool for connecting rods. The press-fitting tool comprises a support bottom board, on which a support and a fixing board are fixedly connected. An oriental device assembly is installed on the support. The upper end of the oriental device assembly is connected with a crankconnecting rod assembly. The lower end of the oriental device assembly is connected with a punching rod. A locating device is arranged on the fixing board. The tail end of the punching rod is connected with two product pistons which are to be installed in a press fitting manner. A pneumatic device driving the two product pistons to move is arranged on the locating device. The tool can effectivelysave press fitting time while accurately locating the press fitting position of each connecting rod. Space for product storage is greatly saved. Products are firm and not likely to fall down. Therefore, product performance is effectively improved. Abnormal sounds are eliminated. Service lifetime of products is prolonged.