Abstract: The effect of different fumigating concentration( 0.5、1.0、2.0、0 μL·L- 1( CK)) of 1- methylcyclopropene( 1-MCP) on nutrition quality of yard- long bean were assessed by investigating some physiological indexes.The increasing of cellulose of yard- long bean storaged at( 14.3 ± 2) ℃ was reduced significantly( p < 0.05) with0.5 μL·L- 11- MCP comparing with the CK group,and the decreasing trend of the content of chlorophyll,vitamin C and protein and the accumulation of malonaldehyde( MDA) of the product was delayed. The activity of PPO and POD was significantly( p < 0.05) lowest and the accumulation of MDA was the most serious with 2.0 μL·L- 11- MCP treatment than other treatments when the examination was over.A better storage effect could be get by fumigating yard- long bean with 0.5 μL·L- 11- MCP in practice.