HongYoun No.1 peat mine is one of the high quality peat mines in the RouerGai Tableland in Sichuan Province. A preliminary investigation was made on quality of the peat in the main ore block of this peat mine. Composition and contents of its element of the peat were analyzed. The results showed that the quality of the peat in No.1 peat mine is better than those in other mines in the Rouergai Tableland and highly worth exploiting.