The present invention relates to a milking flow channel used in a grain milking machine for milking grains such as sesame seeds and perilla, and the grains by allowing the oil milked in the middle portion of the milking bucket to be quickly and completely extracted out of the milking bucket. In a milking machine for extracting oil from grains for the purpose of milking at 100% as well as ensuring that the quality of the milked milk is not compromised; An upper body 14 having a plurality of radial and annular U-shaped channel grooves 12 lines formed on the lower surface 10 and a lower portion of the upper body 14, which is fixed to the rivet 16 and is fixed to the upper surface. (18) has a lower body (22) formed with a plurality of radial and annular U-shaped channel grooves (20) lines, and a combination of the upper body (14) and the lower body (22) has a kind of rectangular shape inside. A flow path board for the milking machine, characterized in that a passage is formed, and a tapered hole (26) is formed at an intersection portion (24) of the radial and annular U-shaped flow path groove (12, 20) line.
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