There are many factors affecting the service life of polyester forming fabric, which are not only affected by the forming mode of paper machine (such as fourdrinier, sandwiched, stacked, etc.) and the technological conditions of paper machine (such as mechanical equipment, material, shape design of dewatering elements, slurry type, ratio of various materials, content of filler type, vacuum degree, network speed, net tension, high pressure water, fine fiber retention rate, etc.), but also related to operation and maintenance.