The invention provides a warp guiding device of a warp knitting machine, and belongs to the technical field of machines. The problem that an existing warp knitting machine is loose in structure is solved. The warp guiding device of the warp knitting machine comprises a machine frame and two yarn feeding rollers erected on a machine frame. A groove body is fixed to the machine frame. The groove body is located between the two yarn feeding rollers. A plurality of partition plates are vertically arranged inside the groove body. The partition plates are evenly distributed in the arrangement direction of the two yarn feeding rollers. The upper end of each partition plate stretches out of the groove body, and a yarn guiding channel is formed between every two adjacent partition plates; a lubricating shaft is horizontally arranged inside the groove body, the partition plates are provided with receding openings through which the lubricating shaft penetrate, both the two ends of the lubricating shaft are fixedly connected with the groove body in the axial direction, the upper side of the lubricating shaft stretches out of the groove body, an air pipe is horizontally arranged over the partition plates, the two ends of the air pipe are the closed end and the opening end respectively, exhaust holes are formed in the lower side of the air pipe in a penetrating mode, the number of the exhaust holes is the same as that of the yarn guiding channels, the exhaust holes are just opposite to the lubricating shaft, and one side of the air pipe is provided with a fan which can supply air to the air pipe, and the warp guiding device has the advantage of being compact in structure.