Abstract: As a large traditional festival sacrifice of Yi people in middle and southern Yunnan,Migaha is of much ecological significance.Through a series of rigid and sacred rituals,Annual Migaha’s sacrifice tradition constantly strengthens ecological concept of co-existence of human beings and the nature,rouses ethnic historical memories and passes on their cultural psychology.Migaha folk art performance for thanking god and entertaining people promotes sustainable inheritance and transmission of ethnic culture,and reinforces ethnic cultural self-confidence.Sumptuous feast interactions drive multi-directional social communications within villages and with external communities.It also integrates every cultural subject within villages,constructs pleasant ecological relations of folk society and maintains a harmonious and close regional society.

Key words: Yi ethnic group, Migaha sacrifice, ecological significance