The　microstructure,　properties　and　applications　of　WC-Co　cemented　carbide　prepared　with　WC　powders　with　different　crystallinity　were　compared.　The　results　show　that　the　crystallinity　of　different　WC　powders　can　be　well　characterized　by　XRD,　SEM　and　laser　particle　size　measurements.　The　hardness　of　the　cemented　carbide　prepared　with　WC　powders　with　a　high　crystallinity　decreases　slightly,　while　the　fracture　toughness,　transverse　rupture　strength,　crushing　strength　and　impact　toughness　increase.　The　preparation　of　a　raw　WC　material　with　a　high-crystallinity　is　the　basis　of　a　high-performance　cemented　carbide.