The invention relates to the technical field of dental restorations, particularly to a method for forming an all-ceramic dental crown by stereolithography of zirconia ceramic slurry. The method comprises the following steps: acquiring three-dimensional data of a dental crown; according to the three-dimensional data of the dental crown, forming zirconia ceramic slurry into a green body on a supporting structure by adopting a digital light processing method; polishing to remove the supporting structure, and degreasing the green body; directly sintering the degreased green body or dyeing the degreased green body by using a dyeing solution, and then sintering to obtain the all-ceramic dental crown; and carrying out surface treatment on the sintered all-ceramic dental crown. According to the invention, zirconium oxide dental crown forming is achieved in an additive manufacturing mode, compared with a subtractive manufacturing method, materials can be saved by 90%, no dust is formed, the method is environmentally friendly, the machining process of the method is not limited by the appearance of the dental crown, and accurate forming of the dental crown with the more complex appearance canbe achieved; and no mechanical cutting exists, and the situation that the overall mechanical property of the dental crown is reduced due to micro-cracks caused by cutting is avoided.