The thought of Kang Youwei 康有為, who is revered as one of the most important Confucian politicians of modern China, has received considerable attention in recent decades. While many studies are devoted to Kang’s theory of Confucianism and his political visions underlying the theory, what is generally overlooked is that, to a large extent, his arguments are built upon his understanding of Mohism. This article argues that Kang Youwei employs the Mozi 墨子 and early narratives about Mozi and Mohism to support his claims that Kongzi 孔子 authored the New-Text versions of the Five Classics, that he was a reformer of political institutions, and that he was a religious leader. By shedding light on Kang Youwei’s discussions of Mohism, this article offers a reconstruction of his argument and an alternative perspective for investigating his New-Text interpretation of Confucianism.