Abstract: The compression and tension mechanical behaviors of short fibre reinforced composite material——PPS(Polyphenylene sulfide) overa wide range of strain rates covering six orders of magnitude are described. The fracture appearance and the cross-section of tested specimens were observed. The results show that the strength and Young smodulus of the short fiber reinforced thermoplastic PPS increase with increasing strain rates and reveal that the fracture of short fibre-reinf orced PPS exhibits brittle behavior. The results indicate that the strain rate effect is remarkable.