Abstract. In this article, a novel hemp stem powders (HSP) reinforced flexible polyurethane foam from polyols and diphenylmethane diisocyanate (MDI) has been prepared by self-rising method using water as blowing agent. The cell morphology of the HP reinforced foam was examined by scanning electron microscope (SEM). Besides, the influence of HSP content on the mechanical property such as tensile strength, compressive strength, and resilience were studied.