Oblique paper tape filter is a new filter equipment for filtering the emulsion by filter paper, oblique filter does not need chain mesh, is the front motor drive paper rolling mechanism, drag the used filter cloth out of the filter, while the front of the filter is provided with a scraping board, which can scrape the impurities adhering to the filter cloth. Because the inclined filter has a temporary storage function, it can filter a relatively large flow volume with a small filtration area. The inclined filter is used in places with small installation space, and can be used for the filtration of CNC machine tools, the filtration of grinding machines, and the filtration of high frequency welded pipe coolant.