Abstract: The present invention provides a composition of a mixture comprising Radix Aconiti, Radix Aconiti Kusnezoffii, Rhizoma et Radix Notopterygii and Radix Angelicae Pubescentis, and an herbal extract composition of a mixture comprising Radix Aconiti, Radix Aconiti Kusnezoffii, Rhizoma et Radix Notopterygii and Radix Angelicae Pubescentis. A method for preparing the herbal extract composition and a product by the method thereof is further provided by the present invention. The herbal extract composition is useful for alleviating pain and treating diseases such as rheumatoid arthritis (RA) or osteoarthritis (OA).