This invention relates to a static self contagious method to preparing ceramic coating die, which comprises the following steps: a, mixing the reaction raw material AL and Fe 203 powder; fill the die with the mixed powder, fixing the cavity die, skirt and duct together and cover the cap of the skirt and duct; b, preheating the die in the heater, taking the die out and setting vertical, moving the cap out; c, igniting the mixed powder, Al and Fe 203 will create thermite reaction, the product Fe and Al 203 will be in liquor condition, Al203 liquid phantom will adhere to the inner wall of the cavity die and crystallization, forming continuous coating lever in the inner wall; d, Fe liquor will curing at last, removing the Fe solid in the duct tube, cooling and removing the skirt and duct, getting the rough cavity die; e, abrasive machining the ceramic coating in the inner wall of the rough cavity die.