Abstract: A new type of fillers, boehmite(BM)，was utilized in the preparation of x-PA6 based composites. As the amount of BM increased, the mechanical properties and thermal conductivity of the composite were improved When the content of BM was 15 wt%，the tensile strength， flexural strength，heat distortion temperature(HDT), and thermal conductivity of the composites were increased by 10.1 %，8.1 %，10.5 %，and 85.48 %, respectively Scanning electron microscopy (SEM) showed that BM was well dispersed in x-PA6/GF matrix.

Key words: high flow polyamide 6, glass fiber, boehmite, thermal conductivity