The invention relates to a composite covered
yarn and a manufacturing method thereof and also relates to a high-temperature filter cloth. The composite covered
yarn comprises an outer layer of coveredyarn made of short
fiber and an inner layer of reinforcing rib made of long
fiber, wherein the composite covered
yarn is formed by using the covered yarn, made of one or a plurality of types of shortfibers, to cover the reinforcing rib or the
metal wire reinforcing rib made of one or a plurality of types of long fibers by thermal cleaning, dipping,
drying and
sintering. The composite covered yarn manufactured by the method not only saves cost, but also combines the characteristics of high strength of the long
fiber and good abrasion resistance and
toughness of the short fiber and enhances service life, strength, high-
temperature resistance and stability of the composite covered yarn. The composite covered yarn can be made into the filter cloth.