The present invention relates to an MXene-metal composite material and a preparation method therefor. The technical solution used by the present invention involves: (1) mixing metal salt particles with hydrofluoric acid to formulate a solution, further placing an MAX raw material into the solution and stirring same; and (2) after a reaction is complete, centrifuging the reaction solution in step 1), and washing and vacuum drying a solid resulting from the centrifugalization to obtain an MXene-metal composite electrode material. The present invention fully utilizes waste hydrogen gas in the process of the preparation of MXene by using MAX, and the prepared MXene-metal composite electrode material has the advantages of uniform dispersion, a high specific energy, a good circularity, a simple process, etc.; furthermore, waste gas generated during the process of reaction is effectively utilized, thereby reducing production procedures and costs, resulting in a high production efficiency, and same can better meet requirements for industrial production and realize large-scale production, so that same has great application prospects.