The invention discloses a supported-palladium resin catalyst and a preparation method thereof. The catalyst is mainly used in a process for synthesizing MIBK by taking acetone and hydrogen as raw materials. The invention adopts the method by adding a chelating agent into a palladium salt solution to form a palladium chelate, and evenly adsorbing the palladium chelate on resin to prepare the supported-palladium resin catalyst. The supported-palladium resin catalyst has the characteristics of evenly supported palladium, high selectivity, high activity, long service life, and the like.