The invention discloses a perovskite nano-LaCoO3 porous hollow sphere material and a preparation method thereof. The preparation method comprises the following steps: preparing 0.4g of carbon spheres according to a literature, weighing lanthanum nitrate hexahydrate and cobalt nitrate hexahydrate according to a molar ratio of 1:1, dissolving lanthanum nitrate hexahydrate and cobalt nitrate hexahydrate in water, carrying out ultrasonic treatment at normal temperature for 15min to realize uniform dispersion, transfer the obtained uniform solution to a 100ml hydrothermal kettle, reacting at 160DEG C for 12h, naturally cooling the obtained product to room temperature, centrifuging and washing the cooled product to obtain a black brown precipitate, drying the precipitate at 100DEG C for 4h, heating the dried precipitate to 400DEG C, keeping the temperature for 4h, heating the precipitate to 700DEG C, and keeping the temperature for 4h to obtain the perovskite nano-LaCoO3 porous hollow sphere material. The perovskite nano-LaCoO3 porous hollow sphere material is obtained through direct hydrothermal synthesis with glucose carbon spheres as a template, the preparation method has the advantages of simplicity, no need of a precipitating agent, and environmental protection, and the finally obtained product has the advantages of uniform dimension, high purity, good crystal form and easy control.