Fuente: WIPO "hemp" An anti-abrasion knotting machine for hemp and polyester blended fabric comprises a machine body, an operation table and a U-shaped frame, the machine body is fixedly installed on the operation table, the operation table is movably installed on the U-shaped frame, a third bevel gear coaxial with a second rotating shaft is fixedly installed in the middle of the second rotating shaft, and a second inner threaded pipe is fixedly installed in the middle of the bottom face of the operation table. A second screw is installed in the second inner threaded pipe in a threaded mode, the fourth bevel gear is meshed with the third bevel gear, a shaft sleeve is installed on the periphery of the second screw through a bearing, and one side of the shaft sleeve is fixedly installed on the U-shaped frame. According to the device, lifting of the operation table and the machine body and fixing of the U-shaped frame can be completed only by one person, the adjusting range of the operation table and the machine body can be widened, the device can be better suitable for operators, the operation table and the machine body can slowly move downwards, and the working efficiency is improved. Damage to the operation table or the machine body due to vibration during descending is avoided, and meanwhile, the phenomenon that hands are clamped due to too fast descending can be avoided.