The invention provides a method for preparing high-titanium slag through low-temperature gas-based reduction titanium-containing iron mineral powder. According to the method for preparing the high-titanium slag through the low-temperature gas-based reduction titanium-containing iron mineral powder, the pre-oxidation titanium-containing iron mineral powder is utilized and then subjected to gas-based reduction, and then pig iron and a high-titanium slag product are obtained through melt separation; compared with a traditional process for smelting titanium slag with an electric furnace, the high-titanium slag product can be obtained by conducting melt separation for 15-25 minutes at the temperature of 1500 DEG C-1600 DEG C after reduction is conducted for 1-5 hours under the environment of the low temperature of 900 DEG C-1300 DEG C, so that the comprehensive energy consumption is lower, the efficiency is higher, the cost is reduced, and the purpose of separating the pig iron from the titanium slag in an efficient, low-consumption and low-cost mode is achieved; meanwhile, the metallization recovery rate of iron elements is also increased; the grade of the obtained high-titanium slag is higher; and therefore, the method provides a novel process for producing the high-titanium slag, so that the problems that high-titanium slag preparation is complex in process, low in production efficiency, high in cost, large in energy consumption and the like in the prior art are solved.