In order to increase the reliability of resistance welding spot，the approach and
methods were propoesed．The reasonable measure for assuring welding spot quality were adopted．The
reliability engineering technique assistance analysis was adopt，eg．the whole course of the welding
was monitored and analyuzed for welding quality contr01．The outside factor effects affecting the
welding spot quality were determined，the mending measures were then taken．Therefore，the resistance
welding spot reliability was increased．