The invention relates to the field of yogainstruments, in particular to a yogainstrument having a medical sterilization function and a processing method thereof. The yogainstrument comprises a column body and an annular tube, wherein the column body is a hollow column body, a medicine groove is formed in the column body, a plurality of round holes are formed in the medicine groove and are led to the outer side of the column body, a medicine bag is contained in the medicine groove and contains a health-care traditional Chinese medicine, the annular tube is installed in the middle of the column body, and the inner side of the column body is tightly matched with the outer side of the annular tube. The column body is integrally cast and formed by an ETPU material. The outer surface of the column body is wavy or is designed with a plurality of round protrusions. The yogainstrument has the advantages of being simple and ingenious in design, reasonable and compact in product structure, degradable, more environmentally friendly, heat-resistant, abrasion-resistant, tear-resistant, slip-stopping, damping, high in resilience force, anti-microbial and air-permeable, is very suitable for people to perform body building and yoga, facilitates health care of human and meets the market demand.