The key of single terminal fault location is to identify the fault point reflected wave and the opposite bus reflected wave. In order to identify the wave accurately, a new method combined with impedance measurement and wave, is presented. The impedance measurement method can calculate the location roughly. According to the actual error, the range for wave tip can be narrowed. Then the relationship between fault reflected wave and opposite bus reflected wave can be used to find the time of wave tip. The fault distance can be calculated by the time and the wave velocity. This method finds two wave tips at the same time and the tip time restrict each other, which is more accurate than finding one wave tip only. Matlab and ATP-EMTP simulation results show the method is reliable.