The invention discloses a knitted natural red pigment which is prepared from the following raw materials: red pepper, penstemon, clusteramaryllis, oriental variegated coralbean flower, red maple, red leaf cherry plum, blackberry, purple sweet potato leftover, pitaya peel, rambutan peel, lactic acid bacteria and cellulose. The knitted natural red pigment provided by the invention is simple in preparation, can be subjected to industrialized production, is extracted from pure natural plant raw materials and is low in price, and the cost is saved by 17.4%. The red raw materials are fermented by lactic acid bacteria, so that the acidity is regulated, the natural aroma is increased, the pigment extraction rate is improved by 8.3% compared with that of the conventional method, the pigment is kept bright for a long time, small molecular substances produced by lactic acid bacterium fermentation can promote dyeing, and then the cloth is rapidly dyed and does not fade; and moreover, during dyeing, only distilled water needs to be added for diluting, only ultrasonic short-term soaking or spraying is needed, the operation is convenient and rapid, the working efficiency is improved, and the pigment is uniform in dyeing, pure in color, unfading, mildew-proof, mothproof, safe and environmental-friendly, can prolong the service life and contributes to human health.