The invention relates to a low-temperature-expansion type liner and a manufacturing method thereof. The low-temperature-expansion type liner and the manufacturing method thereof have the advantages that large-diameter polycrystalline mullite fibers are mixed with small-diameter amorphous aluminum silicate fibers according to a certain proportion, an organic adhesive easy to pyrolyze is used, the use amount of the adhesive is reduced, and the initial expansion temperature of the expansion type liner is lowered to below 300 DEG C; the low-temperature-expansion type liner can be well applied to a vehicle tail gas post-treatment system low in working temperature.