The invention discloses a novel emergency stop switch, and belongs to the technical field of emergency stop switches. An existing emergency stop switch needs to be reset manually, and in some equipment facing an end user, the emergency stop switch is frequently pressed by mistake, so that the equipment cannot be used normally, and a worker or an operation and maintenance worker needs to speciallyreset the emergency stop switch on site. The device comprises a fixing buckle with a hollow cavity, a top cover capable of rotating relative to the fixing buckle and moving up and down, a spline shaftarranged below the top cover, a shaft shell capable of limiting the stroke of the spline shaft, and a first elastic part capable of driving the top cover to reset. Through continuous exploration andtests, the technical prejudice that an existing emergency stop switch must be reset manually is broken through, the motor assembly can drive the spline shaft to rotate, then the first elastic part drives the spline shaft and the top cover to reset, then the emergency stop switch is reset, equipment can operate in time, the equipment utilization rate is increased, and the operation and maintenancecost is reduced.