The present invention relates to a method for preparing hierarchical zeolites, including the steps of preparing a first mixture solution including a structure-directing agent, an alumina precursor and a pH controller; preparing a second mixture solution by injecting a silica precursor into the first mixture solution; preparing an aqueous solution including a surfactant; preparing a third mixture solution by injecting the aqueous solution into the second mixture solution; and drying and heat-treating the third mixture solution. According to the present invention, hierarchical zeolites having a uniform morphology can be prepared, and thus hierarchical zeolites having improved activity are provided.