The invention discloses a method for directly preparing TiAl alloys from titanium ores. The method comprises the following steps: high-grade rutile or high titanium slag is chlorated for fractional distillation to obtain rough TiCl4 liquid; Al powder slightly exceeding the chemical equivalent and micro halogens MClx are added in the rough TiCl4 under the AlCl3 catalysis for heating reaction between 100-250 DEG C to generate mixtures containing TiCl2/TiCl3 and AlCl3; and meanwhile, VOCl3 in the rough TiCl4 is reacted to generate VOC12 precipitates for removal, so that the additional vanadium removing procedure is saved; and then, the temperature is quickly increased to 900-1250 DEG C, so that the mixtures are further reduced to prepare the TiAl alloys. Through reasonable chemical reaction control, the additional vanadium removing procedure is saved, the production flow is simplified, and the production cost is greatly reduced.