Abstract: Six patients with advanced lung cancers were trated with fast neutron and photonbeam at the Neutron therapy facility of the high-energy physics institute, Chinese Academy of Sciences. There were 4 cases with primary lung tumors,1 with bone metastasis and the other 1with cervical lymph node metastasis. The doses ranged from 330ncGy to 840ncGy. All treatment5/6.All Showed early mild skin reactions.