The invention discloses a material storage mechanism for warp knitting yarn, which belongs to the field of textile processing machinery and equipment. The invention includes a material guide bracket, a feed roller, a discharge roller and a material storage mechanism. The material storage mechanism is arranged on the material guide bracket between the feed roller and the discharge roller. The material storage mechanism includes a material storage motor, a lifting bracket, The front lifting plate, the front storage roller, the lifting chain, the rear lifting plate and the rear storage roller, the lifting bracket is slid and set on the front storage guide rod in the vertical direction, and the front lifting plate is slid and set on the auxiliary storage guide in the vertical direction. Rod, the front storage roller rotates horizontally and is connected to one side of the front lifting plate, the rear lifting plate slides vertically on the rear storage guide rod, and the rear storage roller rotates horizontally and is connected to one side of the rear lifting plate. The invention has a reasonable structural design, and can quickly and conveniently store the warp-knitted yarn during the transmission process according to the needs of use, so as to meet the needs of production and use.