Air-foam flooding is an important technology in tertiary recovery and preparation and selection of its foam system are very important. Based on high temperature and high salinity oil reservoir conditions in Jilin Oilfield, conducted is research on selection and evaluating experiments of foam system in air-foam flooding. Adopted is the Warning Blender mixing method, foam complex index is taken as evaluation index and conducted is indoor primary selection of 9 kinds of foaming agents. Experiment results show that the selected primary surfactant LW has good temperature and salt resistance and defoaming capability. Compounded is the primary surfactant LW with different types of foaming agents respectively according to a reasonable proportion and proposed is a feasible plan for foam system in air-foam flooding of Jilin Oilfield.