Recently, government published curriculum standards and textbooks developed by publishers have all been stamped as constructivism. However, the definitions of constructivism are highly confused. Therefore, this paper tries to analyze the basic concepts of constructivism and its implications for curriculum design. First, major schools of constructivism are analyzed. Second, principles and practice of curriculum design are explored from the perspectives of constructivism. Third, the limitations of constructivism on curriculum design are discussed. Finally, a prospective development of curriculum research and design are assessed from a constructive approach.