A new bandgap reference(BGR) curvature compensation technology is proposed,which is a kind of multiple transistor combination.On the basis of the existing first-order bandgap reference technology,a compensation current circuit consisting of a sink current branch and a source current branch is added.The BGR was designed and simulated by using Semiconductor Manufacturing International Corporation(SMIC) 0.18μm CMOS process.The simulation results showed that when the power supply voltage was 1 V,the temperature coefficient of the BGR was 2.08 ppm/℃with the temperature range from—40 to 125℃,the power supply rejection ratio (PSRR) was—64.77 dB and the linear regulation was 0.44 mV/V with the supply power changing from 0.85 to 1.8 V. A new bandgap reference (BGR) curvature compensation technology is proposed, which is a kind of multiple transistor combination. On the basis of the existing first-order bandgap reference technology, a compensation current circuit consisting of a sink current branch and a source current branch is added. The BGR was designed and simulated by using Semiconductor Manufacturing International Corporation (SMIC) 0.18μm CMOS process. The simulation results showed that when the power supply voltage was 1 V, the temperature coefficient of the BGR was 2.08 ppm / ℃ with the The power supply rejection ratio (PSRR) was-64.77 dB and the linear regulation was 0.44 mV / V with the supply power changing from 0.85 to 1.8 V.