Fuente: WIPO "hemp" A buttonholing machine accurate guiding device for hemp and polyester blended fabric comprises a table top, a rectangular blind hole is formed in the front face of the table top, a rectangular through hole is formed in the rear end face of the rectangular blind hole, a bottom plate is placed in the rectangular blind hole, and a wave-shaped sliding groove and a vertical sliding groove are formed in the bottom plate. And a vertical sliding plate is placed in front of the bottom plate, a plurality of transverse sliding plates are fixedly installed on one side of the vertical sliding plate, a plurality of protruding columns are arranged on the back face of the vertical sliding plate, and the protruding columns penetrate backwards through the wave-shaped sliding grooves and are in sliding fit with the wave-shaped sliding grooves. When the device is used, a worker only needs to position the position of the first lock hole, then the sliding plate can be pushed along the sliding groove to complete guiding and positioning of the follow-up lock hole, the device is convenient and fast to use, clothes are clamped through the transverse clamping plate and the vertical clamping plate, and deviation of cloth in the machining process can be avoided.