An action structure is composed of a handle part, an action part, a tenon part, and a trajectory adjusting device. An extended handle extension seat drives a corresponding action piece through an operation of the handle, and an action piece inner tenon is located at a lower rim of the action. The action piece is fixed at a rear side through this latching effect, and at a same time, the trajectory adjusting device which is enclosed by the action piece is exposed for an adjustment of the trajectory. In addition, an action release tenon is assembled with the action piece inner tenon through an extended tenon extension rod, such that the action piece can be restored to an original position by pressing the action release tenon, thereby enabling a recoil movement of the action to achieve an effect of simulating a real gun.