Abstract: In degraded grasslands, the growth of Puccinellia tenuiflora follows a seasonal variation pattern, with a maximum biomass in August (98.4 g/m2). Among the eight environment factors that directly and indirectly affect the growth of Puccinellia tenuiflora, hydrolysable nitrogen, effective phosphorus, quick-acting potassium, pH, water content and electric conductirity are the most important.