Abstract: In order to explore the pore of woven filter cloth and its distribution and provide a basis for the design and selection of the woven filter cloth,this paper discusses the aperture problem of filter cloth.It uses bubbling aperture to express the pore of filter cloth and its distribution and analyzes the relationship between the bubbling aperture of filter cloth and the fabric structure by testing.The results indicate that the bubbling aperture of filter cloth decreases along with the fabric density increasing,increasing yarn twist enlarges the bubbling aperture of filter cloth,and the effect of fabric texture on the bubbling aperture of filter cloth is that the aperture of the plain weave is the smallest and the twill weave is the biggest.The smaller the aperture of filter cloth,the better the uniformity of filter cloth aperture.