The invention discloses an energy-saving type roller type fine grinding device for PVC new material machining. The device comprises a base, a grinding box, a dividing device, a driving motor, and a screening groove; the dividing device is arranged on the left side of the top of the grinding box, a primary grinding cavity is formed in the upper portion in the grinding box, a limiting sliding rod ishorizontally welded into the grinding box, the screening groove is arranged on the limiting sliding rod in a sliding manner, a PVC new material is subjected to intervalic charging, through PVC new material grinding, the blockage appearing in smashing due to too much one-time charging is avoided, the grinding effect is greatly improved, during screening, the screening groove moves left and right,screening speed of the PVC new material powder in the screening groove is improved, the condition that the PVC new material powder blocks meshes is avoided, meanwhile, through the driving motor, grinding and screening are driven at the same time, the use rate of the motor is greatly saved, meanwhile, the energy saving effect is achieved, and the device is energy-saving and environment-friendly.