The present invention relates to a manufacturing process for processed roots of Rehmannia glutinosa Liboschitz var. purpurea Makino and, more specifically, to a manufacturing process for processed roots of Rehmannia glutinosa Liboschitz var. purpurea Makino using extrusion molding which enables the processed roots of Rehmannia glutinosa Liboschitz var. purpurea Makino to be manufactured conveniently for a short time by designing an extrusion molding apparatus qualified certain conditions and manufacturing the processed roots of Rehmannia glutinosa Liboschitz var. purpurea Makino using the same apparatus according to the conditions. The manufacturing process for the processed roots of Rehmannia glutinosa Liboschitz var. purpurea Makino using extrusion molding according to a desirable embodiment of the present invention comprises: a step for pulverizing dried roots of Rehmannia glutinosa Liboschitz var. purpurea Makino into 100 mesh or smaller； and a step for putting fine powder of the pulverized dried roots of Rehmannia glutinosa Liboschitz var. purpurea Makino into the extrusion molding apparatus and extruding. Also, the extrusion molding apparatus according to a desirable embodiment of the present invention comprises: a casing (100) in which a slot (60), wherein the fine powder is inserted, and a nozzle (50), which is discharged when extruded, are formed； a screw (20) which is rotated to extrude the fine powder inserted into the casing (100)； a driving motor (10) which is connected to the screw (20) to drive the same； and multiple barrels (30) which is installed on the external surface of the casing (100), in which the screw (20) is installed, to adjust different temperatures at every interval of a certain length.본 발명은 건지황 가공공정에 관한 것으로, 더욱 상세히는 일정한 조건으로 이루어지는 압출성형기를 설계하고 그 조건에 따라 압출성형기를 사용하여 건지황을 가공함으로써 단시간에 간편하게 숙지황과 유사한 건지황을 제조할 수 있는 압출성형을 이용한 건지황 가공바업에 관한 것이다. 본 발명의 바람직한 실시예에 따른 압출성형을 이용한 건지황 가공방법은 건지황을 100메쉬 이하의 크기로 분쇄하는 단계와, 분쇄된 건지황 미분을 압출성형장치에 투입하여 압출성형하는 단계를
