A method for preparing a multichannel ceramic hollow fiber, comprising the following steps: preparing membrane casting solution: a uniform and stable membrane casting solution is formed by evenly mixing - a ceramic powder, which is characterized in that said ceramic powder is one or two of yttria-stabilized zirconia, aluminum oxide or titanium oxide while the scope of the average particle diameter of the powder is 0.05-4 μm; - a macromolecular polymer which is one or two of polyether sulfone, polysulfone or vinylidene fluoride homopolymers; - an organic solvent which is one or two of N-Methylpyrrolidone, dimethylformamide, dimethylacetamide or trichloromethane; - a dispersant which is one or two of polyvinylpyrrolidone, ethylcellulose or polyethylene glycol; wherein, the ceramic powder accounts for 55-65%, the macromolecular polymer 4-8%, the organic solvent 27-38% and the dispersant 0.6-1.6% of the total mass of the membrane casting solution; vacuum bubble removing: removing the bubble in the membrane casting solution under vacuum degree; forming of multichannel ceramic hollow fiber membrane: the membrane casting solution passes through a multichannel hollow fiber die driven by an air pressure of 0.1-0.4 MPa to form a multichannel ceramic hollow fiber membrane green body after the phase inversion in the internal and external coagulation baths through an air clearance of 10-40 cm; drying: drying the green body of multichannel ceramic hollow fiber membrane naturally at 40°C-60°C; high temperature sintering: placing the green body of multichannel ceramic hollow fiber membrane in a furnace and rising temperature through a program to obtain a multichannel ceramic hollow fiber membrane by means of sintering, wherein the temperature during the sintering step is risen to 500-600°C at a heating rate of 1-2°C/min through the program in the first place, then it is risen to 1400-1600°C at a heating rate of 3-5°C/min and preserved with the heat for 4-8h, and then cooled to 500-600°C at a rate of 3-5°C/min and finally cooled naturally. preparing membrane casting solution: a uniform and stable membrane casting solution is formed by evenly mixing - a ceramic powder, which is characterized in that said ceramic powder is one or two of yttria-stabilized zirconia, aluminum oxide or titanium oxide while the scope of the average particle diameter of the powder is 0.05-4 μm; - a macromolecular polymer which is one or two of polyether sulfone, polysulfone or vinylidene fluoride homopolymers; - an organic solvent which is one or two of N-Methylpyrrolidone, dimethylformamide, dimethylacetamide or trichloromethane; - a dispersant which is one or two of polyvinylpyrrolidone, ethylcellulose or polyethylene glycol; wherein, the ceramic powder accounts for 55-65%, the macromolecular polymer 4-8%, the organic solvent 27-38% and the dispersant 0.6-1.6% of the total mass of the membrane casting solution; - a ceramic powder, which is characterized in that said ceramic powder is one or two of yttria-stabilized zirconia, aluminum oxide or titanium oxide while the scope of the average particle diameter of the powder is 0.05-4 μm; - a macromolecular polymer which is one or two of polyether sulfone, polysulfone or vinylidene fluoride homopolymers; - an organic solvent which is one or two of N-Methylpyrrolidone, dimethylformamide, dimethylacetamide or trichloromethane; - a dispersant which is one or two of polyvinylpyrrolidone, ethylcellulose or polyethylene glycol; vacuum bubble removing: removing the bubble in the membrane casting solution under vacuum degree; forming of multichannel ceramic hollow fiber membrane: the membrane casting solution passes through a multichannel hollow fiber die driven by an air pressure of 0.1-0.4 MPa to form a multichannel ceramic hollow fiber membrane green body after the phase inversion in the internal and external coagulation baths through an air clearance of 10-40 cm; drying: drying the green body of multichannel ceramic hollow fiber membrane naturally at 40°C-60°C; high temperature sintering: placing the green body of multichannel ceramic hollow fiber membrane in a furnace and rising temperature through a program to obtain a multichannel ceramic hollow fiber membrane by means of sintering, wherein the temperature during the sintering step is risen to 500-600°C at a heating rate of 1-2°C/min through the program in the first place, then it is risen to 1400-1600°C at a heating rate of 3-5°C/min and preserved with the heat for 4-8h, and then cooled to 500-600°C at a rate of 3-5°C/min and finally cooled naturally.