Disclosed is a switching device of a gas stove. The switching device of the gas stove comprises a regulating valve, a rotary knob, a baffle and a stopping structure. The regulating valve is provided with a channel opening and a rotary bar, and the rotary bar can be rotated to change the opening area of the channel opening so as to adjust gas flow. The rotary knob is connected to one end of the rotary bar. The baffle is located between the rotary knob and the regulating valve. The baffle is provided with a hollowed-out area. First and second stopping parts are disposed at the peripheral edge of the hollowed-out area of the baffle. The stopping structure is in chain joint with the rotary knob and can be driven by the rotary knob to abut against the first stopping part or the second stopping part. When the stopping structure abuts against the first stopping part, the channel opening has a first opening area suitable for natural gas; when the stopping structure abuts against the second stopping part, the channel opening has a small second opening area suitable for liquid barreled gas.