A jewelry clasp having a male connector, a female connector, a locking sleeve, chain connectors and locking cylinders. The chain connectors are connected to outer end surfaces of the male connector and the female connector. The locking cylinders are sleeved onto outer ends of the male connector and the female connector. Positioning locking devices which allow the chain connectors, the male connector and the female connector to be connected together are provided between the locking cylinders and the chain connectors. The female connector is sleeved into one end of the locking sleeve, and a locking device is provided between the female connector and the locking sleeve. The male connector is sleeved into another end of the locking sleeve; an inner end of the male connector is coupled with an inner end of the female connector; another locking device is provided between the male connector and the locking sleeve.