A 3D printer comprising: a chassis; a light source; and a controller, wherein a liquid storage tank is arranged in the middle of the chassis, the liquid storage tank being configured to hold a polymerization liquid; the 3D printer further comprising a base which is adapated to the liquid storage tank in a para-position way, wherein the base is connected with a driving device, and the light source is matched with the bottom of the base, and an anti-sticking element arranged on a bottom of the liquid storage tank and in contact with the polymerization liquid, the anti-sticking element being a polymer film used as a covering part for the liquid storage tank and comprising a plurality of microscopic three-dimensional modules, wherein a three-dimensional part is formed by polymerization of the polymerization liquid on the anti-sticking element; the anti-sticking element prevents the three-dimensional part from sticking to the bottom of the liquid storage tank; characterized in that the plurality of microscopic three-dimensional modules comprise a protrusion structure that reduces a contact area between the microscopic three-dimensional module and the three-dimensional part and further reduces an adhesion force between the three-dimensional part and the anti-sticking element; a ratio of a length of the plurality of microscopic three-dimensional modules to a maximum width of the microscopic three-dimensional module is 1 to 1000; and a ratio of a length of the plurality of microscopic three-dimensional modules to a distance between the microscopic three-dimensional module and a neighboring microscopic three-dimensional module is 1 to 1000. a chassis; a light source; and a controller, wherein a liquid storage tank is arranged in the middle of the chassis, the liquid storage tank being configured to hold a polymerization liquid; the 3D printer further comprising a base which is adapated to the liquid storage tank in a para-position way, wherein the base is connected with a driving device, and the light source is matched with the bottom of the base, and an anti-sticking element arranged on a bottom of the liquid storage tank and in contact with the polymerization liquid, the anti-sticking element being a polymer film used as a covering part for the liquid storage tank and comprising a plurality of microscopic three-dimensional modules, wherein a three-dimensional part is formed by polymerization of the polymerization liquid on the anti-sticking element; the anti-sticking element prevents the three-dimensional part from sticking to the bottom of the liquid storage tank; a three-dimensional part is formed by polymerization of the polymerization liquid on the anti-sticking element; the anti-sticking element prevents the three-dimensional part from sticking to the bottom of the liquid storage tank; characterized in that the plurality of microscopic three-dimensional modules comprise a protrusion structure that reduces a contact area between the microscopic three-dimensional module and the three-dimensional part and further reduces an adhesion force between the three-dimensional part and the anti-sticking element; a ratio of a length of the plurality of microscopic three-dimensional modules to a maximum width of the microscopic three-dimensional module is 1 to 1000; and a ratio of a length of the plurality of microscopic three-dimensional modules to a distance between the microscopic three-dimensional module and a neighboring microscopic three-dimensional module is 1 to 1000. the plurality of microscopic three-dimensional modules comprise a protrusion structure that reduces a contact area between the microscopic three-dimensional module and the three-dimensional part and further reduces an adhesion force between the three-dimensional part and the anti-sticking element; a ratio of a length of the plurality of microscopic three-dimensional modules to a maximum width of the microscopic three-dimensional module is 1 to 1000; and a ratio of a length of the plurality of microscopic three-dimensional modules to a distance between the microscopic three-dimensional module and a neighboring microscopic three-dimensional module is 1 to 1000.