The invention provides a method for refining ferro-titanium on basis of aluminothermy self-propagating gradient reduction and wash heat. The method comprises the steps that firstly, aluminothermy self-propagating gradient reduction is carried out, wherein according to the first manner, raw materials are divided into multiple batches, the materials in the first batch are put into a reaction furnace, magnesium powder is ignited from the top of a material so as to trigger the self-propagating reaction, and materials in other batches are added successively until the reaction is finished; according to the second manner, raw materials except for the aluminum powder are evenly mixed and are added into a continuous mixing machine with the uniform flow speed, meanwhile, the aluminum powder is added into the continuous mixing machine with the gradient progressively-decreasing flow sped, and the evenly-mixed raw materials are continuously introduced into a reaction furnace at the same time to be subject to the aluminothermy self-propagating gradient reduction until all the materials are subject to complete reaction; secondly, heat preservation smelting is carried out to obtain upper layer alumina-base slag and lower layer alloy melt; thirdly, refining slag is sprayed and blown into the lower layer alloy melt for stirring, slag washing and refining; fourthly, the high-temperature melt obtained after refining is cooled to the room temperature, and upper layer melting slag is removed so as to obtain the ferro-titanium.