Abstract: This paper presents a time-base feedback controlled LC resonance capacity charging power supply (CCPS) for Tesla transformer.The main improvement of this new type of LC resonance CCPS is that the multiplex pulse generator used to trigger resonance charging process in traditional LC resonance CCPS is replaced by a feedback circuit specially designed to offer appropriate time-delay triggering.The feedback circuit, composed of several high voltage components, has efficient immunity to electromagnetic interference.Meanwhile, the output short-circuit protection capability of the feedback circuit is available in principle.This new LC resonance CCPS is applied in several Tesla-type ultra wideband (UWB) pulse generators such as CKP1000 and CKP5000, etc.Experimental results show that the new LC resonance CCPS can operate stably in intense radiation circumstance with a repetition rate of 1000 Hz and has quick response to failure occurred in primary circuit of Tesla transformer.