Abstract: A series of SHPF/CPE-AO2246 ternary composites were prepared by using chlorinated polyethylene (CPE), 2, 2'-methylene-bis-(4-methyl-6-tert-butyl-phenol) (AO2246) and seven-hole hollow polyester fibers with 3D crimp(SHPF). The properties and microstructure of the composites were measured and analysed by means of dynamic mechanical analysis, SEM, SW230 absorption instrument and HD026NE electronic fabric tensile tester. The results show that a large number of AO2246 crystals coated on the fiber surface are formed as a result of crystallization induction of SHPF, accelerating the formation of network structure consisting of fiber and AO2246 crystals. The maximum modulus of SHPF/CPE-AO2246 composite with 20% mass ratio (based on the total mass of CPE and AO2246) of SHPF is 3 times as much as that of CPE-AO2246 without SHPF, and the loss factor of the composite decreases sharply due to larger increase of storage modulus of the composite. The area under the curves of loss modulus vs temperature, however, increases with increasing fiber content. This indicates that capability of energy consumption doesn't decline. The mechanical properties of composites obtain great improvement by adding SHPF and the formation of network structure with hollow structure gives ternary composites sound absorption property.