Abstract: A a series of WC-9Ni-xCr samples were prepared through traditional powder metallurgy method. The effects of Cr additive amount on the microstructure and properties of WC-9Ni cemented carbides were investigated using X-ray diffraction, scanning electron microscope, mechanical property tester and immersion corrosion tests. The results show that the addition of Cr tends to inhibite the grain growth of the WC grains, decrease the density and bending strength of WC-9Ni cemented carbides, and increase the hardness and immersion corrosion resistant properties in neutral water of the alloys. With the Cr content increases, the variation tendency of grain size, density, hardness, bending strength and corrosion resistant of the alloy slow down. Furthermore, extensive addition of Cr in WC–9Ni cemented carbides could resulted in the formation of a new phase—(Wx,Cr(1-x))2C, which is easy to become fracture source of the alloy. Combine the results of microstructure and properties: sample 3# with Cr addition of 1.2 wt. % exhibits a relatively comprehensive performance in the five group of samples.