Taking the Ha festival of the Jing peoples as a case,this paper chooses 434 Jing people from the Jing residential area in Fangchenggang city,Guangxi as study samples to analyze the dynamic mechanism of changes of traditional minority festivals. The analysis indicated that the change of Ha festival of the Jing represents characteristics of comprehensive development of function,secularization of festival ceremony,homogenization of material culture,and the difficulty of traditional skill inheritance,the results of combined actions of the motivation of the national subjectivity,the external impetus of the state administrative power and gravity of market forces. It argues that the promotion of healthy development of traditional minority festivals needs to set up good dynamic mechanism to coordinate development of motivation,external impetus and gravity,providing virtuous cycle impetus for the development of such festivals.