Critical oxygen index analyzer for detecting flame retardant effect of textile fabric

The utility model discloses a critical oxygen index analyzer for detecting the flame-retardant effect of textile fabrics, and belongs to the technical field of critical oxygen index analyzer equipment. Comprising an oxygen concentration adjusting instrument, a displayer and a bottom plate, the displayer is arranged on the front face of the oxygen concentration adjusting instrument, and the oxygen concentration adjusting instrument is arranged on the left side of the top of the bottom plate. The two sliding grooves are formed in the connecting plate connected with the bottom of the charging rod, and the inner diameter sizes of the two ends of each sliding groove are different, so that when the bottom of the charging rod moves towards the end with the small size through a connecting plug, the charging rod is not prone to falling off, and the charging rod is not prone to falling off when moving towards the end with the small size through the connecting plug. And the clamping effect is quicker than that of a bolt