The invention relates to the field of spring loaded valves. A safety valve provided by the invention comprises a valve body and a valve element, the valve element is fixedly arranged in an inner cavity of the valve body, and the inner wall of the valve body and the valve element jointly define a pressure relief passage; and a fastener is further included and is fixedly arranged on the valve body,and the fastener abuts against the end, far away from the pressure relief passage, of the valve element. The fastener abutting against the valve element is additionally arranged so that the valve element can be supported by the fastener when impacted by high-pressure fluid; and the capacity of the valve element to bear fluid impact is improved by abutting supporting of the fastener, the possibility that the valve element looses due to long-term fluid impact is reduced, the possibility of movement of the valve element towards the direction away from the pressure relief passage due to fluid impact is reduced, damage caused by fluid impact to the safety valve is prevented to a greater extent, and the safety valve is prevented from losing efficiency in advance.