Loyalty to the party is the political quality and principle of party members and cadres. Xi Jinping has always stressed the loyalty to the party. His series of speeches are rich in party loyalty ideas. From the perspective of loyalty subject positioning, Party loyalty has both the general requirement of all party members and the strict and specific requirements of party members in the “key minority” and key areas. From the perspective of loyalty objects, it points to loyalty to the party in the narrow sense. In a broad sense, it should contain loyalty to the party organizations, the cause of the party, the interests of the people, and communist beliefs. Taking loyalty goals into consideration, it is necessary for party members to be absolute and pure loyalty to the party. With regard to party loyalty idea, Xi Jinping has provided theoretical guidance and practical guidance for complete and strict administering the party in the new era and strengthening party construction.