A novel voltage stabilizer with smoke sampling protection comprises an output protection control circuit and an input protection control circuit. A voltage sampling circuit, a voltage stabilizing control circuit, a motor driving circuit, and a state indication circuit are arranged beside the output protection control circuit. A temperature and current sampling circuit, a smoke sampling circuit, a calculation and processing circuit, and a time delay circuit are arranged beside the input protection control circuit. The output protection control circuit is connected to the input protection control circuit through the time delay circuit. On abnormal conditions, a coil of an autotransformer T1 heats, the insulation of the coil is destroyed, carbon monoxide or hydrogen gas is given off, or smoke is generated, a gas sensor in the smoke sampling circuit collects carbon monoxide or hydrogen gas or smoke and converts carbon monoxide or hydrogen gas or smoke into electric signals, the calculation and processing circuit processes and amplifies the signals, a switch K1 of the input end of the voltage stabilizer is turned off through the input protection control circuit, the coil of the autotransformer T1 cuts off electricity, and then failures can not further expand, so that the purpose of reliable protection is achieved.