It's a paper about research on cultural remains and artifacts excavated from the field work held in 2015 at the Chin-lun site within 324 m^2 excavated area . The site was located near to seashore along south-eastern Tai-tung. By artifacts analysis the archaeological remains excavated from the site which existed between 1800B.P. to 1400 B.P. could be classified to middle stage of the San-he culture which exsited in iron age between 2300B.P. to 1100B.P. named by the San-he site developed subsequent to the Pei-nan culture. The Pei-nan culture was a plain pottery stage culture named by the Pei-nan site exsited between 3500B.P. to 2300B.P. The Incised pottery emerged was the key characteristic to identify the San-he culture and distinguish from the Pei-nan culture latest period. There were three groups of incised pottery in the San-he culture sites, and the first group pottery constituted the culture mainly. The pat terns of incised pottery were complicated which may indicate the developing process of the San-he culture. Observation on the patterns of incised pottery from the Chin-lun site indicates that the snake shape stamp declined and the humanoid shape stamp rised may be the key feature of middle phase of the San-he culture.