Abstract: As an emerging mass sports activity, line dancing is an effective way to promote national fitness and national health. Research into line dancing competition, which is the key point to popularize and develop line dancing throughout the country, can help examine the challenges faced by line dancing competition in China, consolidate and improve the line dancing competition rules, and further explore the path of optimizing line dancing competition in the process of "building a leading sports nation" and implementing the strategy of "Healthy China Development". This study uses the methods of literature and mathematical statistics to summarize the major changes in scoring rules by comparing and analyzing the 2013, 2017, and 2021 editions of The National Line Dancing Competition Rules to provide theoretical support for furthering the level of line dancing competition and optimizing competition events. It is proposed that to strengthen the overall strategic planning and coordinate competition events to promote the development of line dancing competition events in a comprehensive way; add scoring elements, and identify the key aspects for scoring to promote the participation of masses in innovative ways; further the construction of referee team by urging referees to improve their judging ability and professional literacy to ensure the fairness of competition.