The invention relates to a warp feeding device of a warp knitting machine. The warp feeding device comprises a plurality of pan head sets, a plurality of rollers and a frame, the rollers are matched with the pan head sets for use, the frame is used for fixing the pan head sets and the rollers, and the rollers include driving rollers and driven rollers and are driven to work by a speed reducer and a servo motor which cooperate with each other. By the warp feeding device, stability in warp feeding can still be maintained when the warp knitting machine runs at high speed, so that efficiency is improved while fabric quality is guaranteed, and comfortableness, simplicity and convenience in operation are realized.