Polycrystalline alloys PrFe x (x=1.5, x=1.8, x=1.9, x=2.0, x=3.0) have been prepared by arc-melting and subsequent high-pressure synthesis method. Their structure, thermal stability, easy magnetization direction and magnetostriction are investigated. Almost single Laves phase (MgCu 2 -type) is found in sample with x=1.9. Samples with x=2.0, x=3.0 consist of PrFe 1.9 phase with MgCu 2 -type cubic structure and α-Fe phase. The Curie temperature (238°C) and the decomposed temperature (408°C) of PrFe 1.9 alloys are derived from M–T curves. The easy magnetization direction of PrFe 1.9 Laves phase lies along [111] axis at room temperature which is verified by Mössbauer spectrum. Furthermore, PrFe 1.9 alloy shows a large magnetostriction λ || –λ ⊥ =1081×10 −6 at a magnetic field of 13kOe.