The invention relates to a method for microwave drying of high-titanium slag, which comprises the following steps: taking the high-titanium slag of which the water content is between 1 and 2 percent as a raw material; adopting a continuous microwave drying device; according to relatively fixed microwave power, changing the ventilation volumes of different microwave cavities and further adjusting parameters of the transporting rate of materials in the microwave cavities, the thickness of the material and the like; and mounting a stirrer and cavity clapboards in the microwave drying device. The ventilation volumes of ventilation devices in the microwave cavities are controlled to be between 1,247 and 2,250 m<3>/h, the speed rate of a conveying belt is between 0.5 and 2 meters per minute, the thickness of material layers is controlled to be between 1 and 5 centimeters, an air exhaust deduster is arranged at the top end of a discharge device, and the stirrer and the cavity clapboards are arranged on the microwave drying device, thus the method achieves the effect that the mass water content of the high-titanium slag is dried to be 0.3 percent from 1 to 2 percent by effectively controlling the drying temperature of the high-titanium slag to be between 70 and 76 DEG C.