The invention discloses an ordered hierarchical pore alumina supporter and a preparation method and an application thereof, and belongs to the technical field of heavy oil hydrogenation catalytic treatment. The preparation method comprises the following steps: a) mixing a soft template agent, soluble aluminum salt, a binder and a precipitant together, and performing self-assembly to form an ultra-solubilized micelle; b) mixing a hard template agent with the super-solubilizing micelle, and carrying out an in-situ synthesis reaction to obtain secondary nano self-assembled aluminum hydroxide; andc) water-washing and drying the secondary nano self-assembled aluminum hydroxide in sequence, and roasting the material to obtain the ordered hierarchical pore alumina supporter. According to the invention, the amphiphilic block copolymer is used as a soft template agent; according to the present invention, the mesoporous silica material or the mesoporous carbon material is introduced as the hardtemplate agent, such that the controllable synthesis of the ordered hierarchical pore alumina supporter can be achieved, and the prepared alumina supporter can make the active metal highly dispersedin the supporter so as to substantially improve the hydrogenation catalysis effect.