The invention relates to the technical field of safety valves, and discloses a pilot safety valve. The pilot safety valve comprises a main valve outer shell and a pilot valve outer shell; the main valve outer shell comprises a transverse pipe and a vertical pipe; a main valve pressure relief channel is formed in the transverse pipe; a main valve intake bin is formed in the vertical pipe; a main valve element for sealing the main valve pressure relief channel is placed at the top of the main valve intake bin; the main valve element is positioned on the right side of the main valve pressure relief channel; and a main valve return spring is fixedly mounted at the top of the main valve element. An elastic rubber is arranged at the external of a valve element connecting rod, and is positioned in the direction of elastic force of a setting spring; through self elasticity of the elastic rubber, the influence on the setting spring by external force can be reduced, and the shrinkage and extension amplitude of the setting spring is reduced, so that the influence on the elasticity coefficient of the setting spring by the external force is reduced, and the service life of the setting spring isguaranteed; and compared with an external force increasing method, a force relief treatment mode protects the safety of the setting spring more effectively.