The invention relates to a bidirectional idling clutch mechanism. The bidirectional idling clutch mechanism is arranged in a lock body, is mutually connected with a handle, and mainly comprises a main hub, a key open button, an auxiliary hub, a roller and an expansion motor assembly, wherein the main hub is engaged with the handle; one side of the main hub is provided with the key open button, a square rod key and the auxiliary hub in sequence; the roller and the expansion motor assembly are arranged under the four parts; and the main hub, the square rod key and the auxiliary hub are provided with a circular groove to be matched with the roller. The bidirectional idling clutch mechanism has the advantages that the handle idles in normal times, whether a door opens leftwards or rightwards, the mechanism is arranged inside or outside the door, the clutch mechanism can be used; and the side of the door provided with a lock can become a door opening position, and the bidirectional idling clutch mechanism belongs to omnibearing type without directionality, and further reduces complicated work in purchasing and installing.