Abstract: The natural decomposition and nutrient release of four mulching plants were studied using nylon litterbag method from 2004 to 2005, and the twoyear results were as follows: There were some differences in the content of nitrogen, phosphate, potassium and water among four mulching plants. The highest nitrogen and phosphate contents were observed in the leaves of Quercus fabri, reaching 28.50 and 1.77 g/kg respectively, while the highest potassium and water contents were measured in Imperata cylindrical var. major (15.91g/kg) and in the young branch of Coriaria nepalensis(82.70%). During the decomposition of 2year period, decomposition rates of Q.fabri, I.cylindrical, P.aquilinum and C.nepalensis were 96.61%, 100%, 96.49% and 100 %, respectively. However, the decomposition rate was higher in growing season than in nongrowing season, as well as higher in early stage than in late stage. The halflife of Q.fabri was 50day, which is the smallest among four mulching plants, while the biggest halflife was observed in C.nepalensis, reaching 300day. The nitrogenresidue of Q.fabri was the highest among four mulching plants, reaching 17.22 g/kg, while phosphateresidue of I.cylindrical and potassiumresidue of P.aquilinum were the highest, reaching 0.83 g/kg and 4.71 g/kg respectively. The stability of nitrogen, phosphate, potassium content in C.nepalensis was the highest among four mulching plants.