The present invention relates to a crimping insert device with a
crimp-positioning function, which is implemented in two exemplary embodiments. One of the two exemplary embodiments comprises the following: two crimping insert bodies (40, 50), each provided with an upper locking section (41, 51) and a crimping area (42, 52), wherein each upper locking section (41, 51) has a recess in the form of a locking notch (411, 511), each crimping area (42, 52) is provided with several
crimp recesses (421 to 424) and several
crimp protrusions (521 to 524) corresponding to them, and one of the crimping insert bodies (40, 50) is extended on the side located near the crimp protrusions (521 to 524) by means of an enclosing plate body (54), wherein, when the crimp protrusions (521 to 524) are pressed,the positions of the edging plate body (54) corresponding to the crimp recesses (421 to 424) are provided with opposing recesses (541 to 543), wherein the height (H) of each recess (541 to 543) is less than the height (h) of the sheathing piece (711) of a crimp body (71) and the width (W) of each recess (541 to 543) is greater than the width (w) of the extension plate (712) of the crimp body (71). In the other embodiment, one of the crimp insert bodies (40, 50) is extended on the side near the crimp protrusions (521 to 523) by means of a mounting plate body (55), wherein, after the crimp protrusions (521 to 523) have been pressed, the positions of the mounting plate body (54) corresponding to the crimp recesses (421 to 423) are provided with opposing recesses (553) to allow the user tothat when using the crimping pliers (10) he can quickly and accurately position a crimp piece (70') to avoid slippage and impairment of the crimp between the crimp piece (70') and the cable (72).