The invention belongs to the technical field of photocurable additive manufacturing, and specifically discloses a bioceramic slurry used for high-performance DLP printing and a preparation method thereof. The bioceramic slurry comprises bioceramic powder, premixed solution, dispersant and release agent, wherein the mass ratio of the bioceramic powder to the premixed solution is 1: 7-7: 3, and thepremixed solution comprises polyethylene glycol and photocurable resin with a mass ratio of 3: 20-2: 5. The preparation method comprises the following steps of: uniformly mixing photocurable resin andpolyethylene glycol, adding dispersant into premixed solution for ultrasonic mixing uniformly, adding bioceramic powder into the mixed solution, and stirring uniformly, then adding release agent intothe bioceramic slurry initial body, and stirring uniformly, so as to prepare the bioceramic slurry. The bioceramic slurry prepared by the invention can facilitate the lifting of the green body and reduce the internal stress of resin curing in the forming process, reduce degreasing cracking, and improve the success rate in the printing and degreasing processes.