The invention discloses methods for digesting and detecting titanium concentrate, titanium slag or titanium carbide slag. The method for digesting the titanium concentrate, the titanium slag or the titanium carbide slag comprises the following steps of: weighing a sample to be detected, placing the sample to be detected in a container, washing a container wall of the container by using an appropriate amount of deionized water, and shaking the container to make the sample be suspended and dispersed; adding hydrofluoric acid and hydrochloric acid into the container, closing the container, and performing first-time digestion reaction by using microwave; after the first-time digestion reaction is finished, cooling the container, and when the temperature of the container is reduced to 90 to 95 DEG C, emptying acid gas and a volatile reaction product in the closed container; opening the container, adding hydrogen peroxide while the container is hot, and then immediately closing the container; performing second-time digestion reaction by using the microwave; and after the second-time digestion reaction is finished, cooling the container to room temperature, directly diluting by using water and fixing the volume, and thus obtaining a solution of the sample to be detected. According to the methods, the sample is completely digested, and the accuracy, precision, working efficiency and analysis speed of detection data can be improved.