The utility model relates to the technical field of work fixtures, in particular to a universal work fixture for character code marking, which comprises a T-shaped clamping seat, a buffer plate is arranged on the right side of the T-shaped clamping seat, a connecting plate is arranged on the right side of the buffer plate, a positioning hole is formed in the inner surface of the middle end of the connecting plate, a connecting rod is arranged on the inner side of the positioning hole, and a positioning hole is formed in the middle end of the connecting plate. Inner threaded holes are formed in the front end and the rear end of the connecting plate correspondingly, and the middle end of the top of the connecting plate is in threaded connection with a positioning screw with the bottom abutting against the surface of the connecting rod. Through the arrangement of the T-shaped clamping seats, when the combination sequence of the character code templates needs to be changed according to the use condition, the corresponding character code templates are sequentially placed in the clamping grooves of the T-shaped clamping seats, and then the locking screws are rotated to abut against and extrude the stacked character code templates in the clamping grooves of the T-shaped clamping seats, so that the character code templates can be conveniently combined. And therefore, the combined character code template can be fixed, and convenience is brought to people in use.