This paper presents experiments of a double-pulsed high voltage system on a miniature linear induction accelerator(Mini-LIA).The double-pulsed voltage with the hundreds of ns interval is generated by an insulation and junction system.The system can conflux two pulses generated from two pulse power systems into a double-pulse and insulate the affection between them.The experiments show that the interval of the double-pulse can be changed from hundreds of ns to μs.With the result a conclusion is that the multi-pulse with the hundreds of ns interval can be generated by an insulation and junction system from multiple pulse power systems.