Arc welding control method

An arc welding control method comprising:

• alternately switching a feeding rate of a welding wire between a forward-feeding period and a reverse-feeding period,
• repeating a short-circuit period and an arc period,
• switching a welding current to a small current value in the latter half of the arc period to energize,
• setting an average value of the feeding rate according to an average feeding rate setting value,
• setting a welding voltage during the arc period according to a voltage setting value,
• changing a timing, in the latter half of the arc period, wherein the timing is an elapsed time from a start of the arc period, at which the welding current is switched to the small current value based on the average feeding rate setting value and the voltage setting value,
• making the voltage setting value to be set to a reference voltage setting value determined according to the average feeding rate setting value, and
• in a case where the voltage setting value set to the reference voltage setting value is changed by a user, changing the timing at which the welding current is switched to the small current value, from the timing in a case where the voltage setting value is the reference voltage setting value, based on an error amplification value between the voltage setting value changed by the user and the reference voltage setting value.