Novel double-screw pump

The utility model relates to a novel double-screw pump which comprises a pump body, a lining cylinder is arranged in the pump body, the lining cylinder and the pump body form an external flow channel, double screws are arranged in the lining cylinder, and fluid enters the lining cylinder through the external flow channel and is discharged from the middle of the lining cylinder. By arranging the partition plate, convection of fluid in the left direction and fluid in the right direction is avoided, and fluid kinetic energy is kept; a flaring extrusion structure is formed between the double screws, so that liquid is extruded from liquid, and the liquid can be discharged conveniently; by arranging the annular supporting plate, the outflow runner is divided into a plurality of flow dividing runners, liquid is dispersed more evenly at the two ends of the lining cylinder, and therefore more liquid enters the lining cylinder and is extruded by the double screws; and through an air pressure sealing mode, the sealing c