The utility model discloses a general slotting clamp for a press connecting rod. The general slotting clamp comprises a base plate (1), a semicircular guide rail (2), a semicircular base plate (10), a left sliding plate (4), a right sliding plate (5), a middle sliding plate (8), a left racket (3), a right bracket (6) and a middle bracket (9), wherein the left sliding plate (4), the right sliding plate (5) and the middle sliding plate (8) are mounted on a slotting machine guide rail; the left racket (3), the right bracket (6) and the middle bracket (9) are respectively fixed on the left sliding plate (4), the right sliding plate (5) and the middle sliding plate (8); the semicircular guide rail (2) is connected with the left racket (3), the right bracket (6) and the middle bracket (9); a pulley block (12) is fixed in a hole in the lower end of the base plate (1); the base plate (1) and the semicircular base plate (10) are fixed on a slotting machine workbench. Due to clamping and fixing by the general slotting clamp disclosed by the utility model, a slotting machine can be used for processing a semicircular surface of a connecting rod head; the cylindricity and the smoothness of the processed semicircular surface of the connecting rod head are high, and an arc root is flatter.