The utility model relates to a lockless locking device capable of preventing the dual power supply misoperation. The lockless locking device cancels a physical lock in a locking device of an operating mechanism of two insolating switches on an installing rack of the operating mechanism of the dual power supply isolating switches. A swing type lever mechanism is provided, under the switching-in condition, a connecting rod of one insolating switch pushes a corresponding side swing plate and reversely prevents the connecting rod of the other isolating switch from moving to the switching-in direction, so the target of preventing the dual power supply misoperation is achieved. The mechanical lever principle is used to analyze the static state retaining force and the connecting rod dynamic motion trail when the two isolating switches are switched in. Through pushing the swing plate on one side to rotate, a gap between the swing plate on the other side and the connecting rod is changed, the connecting rod of the isolating switch on the other side is prevented from moving to the switching-in direction, and the two isolating switches are avoided to be in switching-in state at the same time, and consequently the target of preventing the dual power supply misoperation lockless locking is achieved. The implementing method is simple, and the lockless locking device is full of innovation and practical value.