In order to study jet formation of the cylinder-cone liner,the formation of cylinder-cone shaped charge was studied by using 300 kV pulse X-ray apparatus. The jet formation of shaped charge was analyzed by numerical simulation. Eighteen X-ray photographs were obtained from 9 experiments. The radiographs of the liner collapse were analyzed at different times. Curves of the jet tip velocity and the jet length vs time were obtained. The results show that the cylinder part of the liner can only produce low speed slug, which has no contribution to increasing the mass and velocity of the jet. Because of the “effects of shock wave”,the jet tip velocity is smaller than that by numerical simulation.