The invention discloses a simulating mechanical tongue. The simulating mechanical tongue comprises a left-and-right-opening-and-closing rotating assembly with and a pair of clamping assemblies. The left-and-right-opening-and-closing rotating assembly comprises a rotating base (6) and a linear guiding rail (4), wherein the rotating base (6) can rotate in the horizontal plane around a shaft (7); the linear guiding rail (4) is horizontally fixed on the rotating base (6), two sliding blocks (8) connected through a bi-directional lead screw (3) are arranged on the linear guiding rail (4), and a first permanent magnet (1) is arranged on each sliding block (8); the bi-directional lead screw (3) is driven by an opening-and-closing stepping motor (2) to drive the two sliding blocks (8) to perform opening movement and closing movement. The pair of clamping assemblies (18) comprise a pair of dental plates (181), clamping plates (182) fixed on the dental plates (181) and second permanent magnets (183) arranged at the bottoms of the clamping plates (182); the left-and-right-opening-and-closing rotating assembly is arranged below the pair of clamping assemblies (18), and the first permanent magnets and the second permanent magnets are arranged in a vertically-opposite mode.