Working space oxygen detection door bolt

The utility model discloses a work space oxygen detection bolt, which relates to the field of bolt equipment, and adopts the technical scheme that the work space oxygen detection bolt comprises a fixed plate and a mounting plate, the fixed plate is positioned on one side of the mounting plate, the horizontal heights of the fixed plate and the mounting plate are the same, a stepped hole is formed in the middle of the fixed plate, and a knob is rotationally arranged on the fixed plate; a rotating shaft of the knob is coaxial with the stepped hole, a locking block is arranged on one side of the knob, a through cross-shaped through groove is formed in the middle of the knob, a cross-shaped sliding block is connected in the through groove in a sliding mode, a tension spring is arranged between the sliding block and the stepped hole, and an oxygen detector is arranged on a fixing plate on one side of the sliding block; a limiting block is arranged on a plate body of the mounting plate, a gap exists between the uppe