The aim of this paper was to explicate the past and future trends of curriculum history research in America. This paper indicated that before 1960s the attribute of curriculum history research was analytic research. Since early 1970s critical curriculum history was initiated, and curriculum history research became a distinct research area. Recently curriculum history research is getting mature, and its trends include: curriculum historiography is self-examining; research area is widening; research approach is proliferating; research explanation is toward multiplicity. The five trends mentioned above could be reference and inspiration for Taiwan nascent curriculum history research