Swidden agriculture system has long been practiced by aboriginals in Taiwan. This study focused on integrating and analyzing swidden agricultural practices and associated traditional ecological knowledge of six aboriginal tribes (Paiwan, Rukai, Tao, Atayal and Sediq) in Taiwan; and with special emphases on land reclamation, crop rotation and species of crops. In general, every family owned 2-3 ha of agricultural land scattered in 4-10 patches, among which 2-4 patches were under cultivation while the remaining 3-7 patches left as fallow. Each patch was cultivated for 2-4 years to produce crops, and then left fallow for 3-8 years. Multiple crops, main crops and outgrowths could usually be found in one patch, and also various crops were grown in different patches during the same season. Traditional ecological knowledge, including multiple crops growing, habitat protecting, resource rotating and adaptation management were discussed in this article; and could be proposed for governmental land managing administrations, such as forest bureau and national park administration, for their management of lands once used by aboriginals.