The invention relates to the technical field of printing, in particular to an anti-slip paper feeding roller for a printer based on the capacitance change. The anti-slip paper feeding roller comprisesa rotating shaft, an electromagnet is fixedly connected to the inner wall of the bottom of the rotating shaft, a magnetism isolating plate is fixedly connected to the outer side, close to the electromagnet, of the inner wall of the rotating shaft, a conveying roller is movably connected to the outer side of the rotating shaft, uniformly distributed negative plates are fixedly connected to the inner wall of the conveying roller, positive plates symmetrical to the negative plates are fixedly connected to the inner wall of the conveying roller, and springs are fixedly connected to the positions,close to the positions between the negative plates and the positive plates, of the inner wall of the conveying roller. According to the anti-slip paper feeding roller for the printer based on the capacitance change, through cooperative use of the electromagnet and magnetic blocks, when the conveying roller rotates, movable blocks rotating to the bottom can extend outwards under the action of homopolar repulsion of the electromagnet and the magnetic blocks and are connected with paper in a clamped mode, so that the contact area between the paper and the conveying roller is effectively increased, rubber plates are effectively attached to the paper, then the effect of preventing the paper from slipping is achieved, and the practicability is improved.