The root-cutting structure of a garlic head harvesting machine is mainly located in a machine body equipped with a driving device. The front and rear are sequentially arranged with an extracting unit, a lifting unit, a conveying unit, a soil removing unit, a root cutting unit and a stem cutting unit. After the extraction unit is used to take the whole garlic, the garlic stem is clamped between the lifting unit and the conveying unit, and the garlic head part is located below the conveying unit near the bottom edge through the pulling unit. , And driven backward by the conveying unit, remove the dirt on the surface of the garlic head through the soil removal unit, and then remove the roots at the bottom of the garlic head through the root cutting unit, and finally cut the stem through the stem cutting unit to leave the garlic head, thus completing the garlic head Harvesting. Wherein, the root-cutting structure is provided with a base composed of an upper frame, a middle frame and a lower frame, a shaft is arranged on the lower frame, and a plurality of blades arranged in a radial pattern are arranged on the shaft. A blade is provided to rotate the root of the garlic in the direction of the blade by the rotation of the blade, so that the blade can cut off the root, so that the harvested garlic head can be cleaner.一種蒜頭採收機之切根結構，主要係於設有驅動裝置之機體，前後依序排設置有擷取單元、拉升單元、輸送單元、去土單元、切根單元及切莖單元。藉由該擷取單元係供將整顆蒜採取後，使蒜之莖部夾持於該拉升單元及輸送單元，經由拉升單元的拉高，使蒜頭部分位於輸送單元下方鄰近底緣處，且由輸送單元帶動向後移動，經由去土單元將蒜頭表面的污土去除，再經由切根單元將蒜頭底部之根鬚去除，最後經由切莖單元將莖部切除留下蒜頭，從而完成蒜頭之採收。其中，該切根結構係設有一由上框架、中框架及下框架組成之基座，於該下框架設有一軸桿，於該軸桿設有複數呈輻射狀排列之葉片，該中框架係設有一刀片，使蒜的根部藉由葉片的轉動向刀片方向撥動，以利刀片將根部切除，使採收之蒜頭得以更為乾淨。
