The invention discloses a safety control device used in a safety inspection system which is used for carrying out safety inspection to liquid by ray sources, which is used for controlling a shielded door used for shielding radioactive rays and comprises: a plurality of launching optical fiber heads used for launching light; a plurality of receiving optical fiber heads which are arranged oppositely to the launching optical fiber heads, wherein, each receiving optical fiber head is used for receiving light launched from the corresponding launching optical fiber head; an amplifying unit provided with a plurality of launching terminals connected with the launching optical fiber heads and a plurality of receiving terminals connected with the receiving optical fiber heads, which is used for generating a triggering signal when the quantity of the optical fibers received by the receiving fiber heads changes; and a control unit used for receiving the triggering signal come from the amplifying unit so as to drive the shielded door. The safety control device can protect the article to be tested during the open and close process of the shielded door, and avoid the shielded door from extrusion during the movement process.