Arc suppressing circuit of electronic ballast output end

The invention discloses an arc suppressing circuit of an electronic ballast output end. A secondary winding of a current resonance output transformer T is connected with two windings n2 and n3 in series and is used for supplying output voltage for parallel tubes, a tapping point of the winding n3 is connected with a silicon-controlled switch in series, the silicon-controlled switch is connected with the tubes and is triggered by a sampling and triggering circuit to communicate or stop. After the silicon-controlled switch is communicated, the secondary winding n3 of the transformer T is in a short circuit. The electronic ballast has excellent low-temperature starting performance and can reduce and maintain output voltage output from a secondary booster coil of the transformer on a level which is insufficient to generate arc charging for causing safety accidents after the tubes are firstly ignited and started.