A photocuring printing system. A developing drum is rotatable and is light-transmissive; the developing drum and a carrier are oppositely arranged and movable with respect to each other; the developing drum has a developing surface on which an electrostatic latent image is formed by the developing engine; a feeder and the developing surface are oppositely arranged; during a rotation of the developing drum, a photocurable material provided by the feeder is selectively attracted by the electrostatic latent image to form a material layer on the developing surface; the material layer is applied, by the developing drum, on a forming surface of the carrier or a cured model on the carrier; and a curing light beam emitted by a curing light source passes through a material-laying side of the developing drum to irradiate the material layer between the developing drum and the carrier to form a cured layer.