In addition to writing and teaching, Sung has helped lay the theoretical foundations and been a standard-bearer for the Taiwanese Consciousness and New Culture movements. He founded Taiwanese New Culture magazine in 1986, has advocated de-Sinification and encouraged the "theory of Taiwanese nationalism," has tirelessly promoted native culture and Taiwanese-language literature, and sparked the Taiwanese cultural reconstruction and literary revival movements.
除了作家與教師身分，宋澤萊同時也是台灣本土意識及新文化的重要旗手和理論奠基者，1986 年創辦「台灣新文化」雜誌，提出「去中國化」、鼓吹「台灣民族論」，大力提倡本土文化與台語文學，掀起一波台灣文化改造和文藝復興運動的熱潮。