Semi-solid hypereutectic high Cr cast iron was prepared by inclined cooling plate method.Effect of two different inclined plate temperature on semi-solid state micro -structure of hypereutectic high Cr cast iron has been studied.The results showed that:when the inclined plate is normal temperature,the temperature grads of melt is large,flowing viscosity increase and mechanism power decrease.Theprimary carbideis crassitudeand haulm.When the inclined plate temperature is 150 ℃,the temperature grads of melt is smaller。The growing tendency of primary carbide should be smaller.The sheering,rolling,friction and impacting become the major element to the forming of primary carbide.Theprimary carbideis smaller and average.