Large-flow filter developed for large diameter pipe and high flow rate, core pieces of stainless steel folded filter relative to competitors ordinary punching basket filter rod folded filter times area. Its opening rate of greater than 50% with a straight-through structure, the combination of maximum flow and minimum pressure differential, greatly reducing the the overall size and weight of the filter to stop using, cleaning and maintenance can be only one person. Our development of the large flow filter in accordance with the installation form discrete and horizontal two structures to choose from.