Electric arc sensing control method and device

The invention provides an arc sensing control method and device. The method comprises the steps that second welding equipment receives a sliding filtering value of welding current and a sliding filtering value of welding voltage sent by first welding equipment in a CAN communication mode; according to the sliding filtering value of the welding current and the sliding filtering value of the welding voltage, a welding current deviation value and a welding voltage deviation value are determined; and according to the welding current deviation value and the welding voltage deviation value, the correction amount of the welding gun position is determined through a fuzzy control algorithm. The CAN communication mode with the transmission speed capable of reaching the microsecond level is used for outputting current and voltage needed by the second welding equipment from the first welding equipment, so that the second welding equipment can receive welding current changes and welding voltage changes fed back in real ti