The synthesis iso-amyl acetate using SnO as catalyst has been studied.The factors influencing the synthesis are discussed and the optimum conditions are found out.They are:molar ratio of iso-pentanol to acetic acid is 1.2∶1,the quantity of catalyst is equal to 1.5% feed stock,the reaction temperature is 110~124℃,and the reaction time is 1.0 h.SnO is an excellent catalyst for synthetizing iso-amyl acetate and its yield can reach over 73.1%.