The invention provides a high-speed gauze folding machine. The problems that when gauze passing folding rollers enters a placing table, gauze mess easily occurs, inconvenience is brought to the following packaging procedure, the gauze is easily entangled on the folding rollers, and machine damage is caused are solved. The high-speed gauze folding machine comprises roller pairs for conveying gauze, a folding mechanism for folding the gauze and a placing table for collecting the gauze passing the folding rollers, wherein the placing table comprises a groove body; the two sides of the groove body are separately provided with vertical guide plates; a vertical baffle is arranged in the groove body; the baffle is in sliding fit with two guide shafts which are fixedly arranged in parallel through shaft holes; each guide shaft is fixed to a tail plate of the placing table; the guide shafts are in transmission fit with a runner which is driven by the guide shafts moving along the axes to rotate in the plane; and a structure that the baffle intermittently moves backwards is formed by the intermittent rotating of the runner. When the folding rollers carry out folding, a proper distance is always kept between the baffle and the folding rollers.