Soto Sokaraja is made from various types of raw materials. Consequently, SMEs difficult to implementing a halal assurance system in order to obtain halal certificate. Therefore, this study was conducted to cluster the raw material of Soto Sokaraja with K-means. In this study, 35 materials were identified in the manufacture of Soto Sokaraja which included raw materials, auxiliary/additional materials and packaging materials. However, there are only 5 materials (14.28%) that have been halal certified. The results of the clustering of materials that have not been certified halal are 20% including the cluster of critical materials and 80% of non-critical materials. This is valid and in accordance with the LPPOM MUI critical material identification guidelines. With the results of this clustering, it can make it easier for SMEs to focus on critical materials to suit the implementation of the halal product assurance system, thereby speeding up the process of applying for halal certification.