A keyboard key comprising: a shell , with a top and a bottom corresponding to the top , that is provided with an axle opening at the top and a guide track structure inside that is longitudinally parallel to the central axis of the axle opening ; a movable terminal that is provided inside the shell and extends to form an arm spring ; and an actuating lever extending through one end of the shell to a keycap , provided with a convex arm spring clamp on the side which comes into contact with the inner wall of the shell , with a pair of identical flat slopes on one side and coming into contact with the arm spring at a position 1 along the circumference of the actuating lever , and a pair of identical positioning slopes on the other side corresponding to forked ends of the arm spring and coming into contact with arm spring at a position 2 along the circumference of the actuating lever , that is threaded through the axle opening , can longitudinally move between an initial position and a trigger position, and is provided with a guiding structure comprising at least one track corresponding to the angle of the flat slope , wherein: the flat slope and the positioning slope extend laterally and away from the actuating lever and extend longitudinally to the bottom of the shell ; the positioning slope is provided with a positioning structure recessing into the positioning slope ; and when the actuating lever is at position 1 or position 2, the guiding structure joins the guide track structure . a shell , with a top and a bottom corresponding to the top , that is provided with an axle opening at the top and a guide track structure inside that is longitudinally parallel to the central axis of the axle opening ; a movable terminal that is provided inside the shell and extends to form an arm spring ; and an actuating lever extending through one end of the shell to a keycap , provided with a convex arm spring clamp on the side which comes into contact with the inner wall of the shell , with a pair of identical flat slopes on one side and coming into contact with the arm spring at a position 1 along the circumference of the actuating lever , and a pair of identical positioning slopes on the other side corresponding to forked ends of the arm spring and coming into contact with arm spring at a position 2 along the circumference of the actuating lever , that is threaded through the axle opening , can longitudinally move between an initial position and a trigger position, and is provided with a guiding structure comprising at least one track corresponding to the angle of the flat slope , wherein: the flat slope and the positioning slope extend laterally and away from the actuating lever and extend longitudinally to the bottom of the shell ; the positioning slope is provided with a positioning structure recessing into the positioning slope ; and when the actuating lever is at position 1 or position 2, the guiding structure joins the guide track structure . the flat slope and the positioning slope extend laterally and away from the actuating lever and extend longitudinally to the bottom of the shell ; the positioning slope is provided with a positioning structure recessing into the positioning slope ; and when the actuating lever is at position 1 or position 2, the guiding structure joins the guide track structure . <EOS>