This article proposed a new design of a chip benchmark power sourse, which is a very important component of mixed signal IC and RF integrated circuit. To meet the requirement of low voltage and large-scale integrated CMOS circuit of high-precision, the use of reference source is rigors for A/D and D/A converter, high sensitive RF circuits and so on. Most parts of the benchmark source employ benchmark bandgap voltage source on chip, so a low power consumption, low temperature coefficient and high performance low pressure CMOS bandgap benchmark voltage source with higher PSRR is designed. It uses one level temperature compensation, current feedback technology, offset circuit temperature compensation technology and RC phase margin compensation technology. This circuit adopts the 0.18um process of TSMC, and uses the Specture to simulate. The simulation result verifies the feasibility and rationality of the design.The circuit can be uesd for low voltage and low power consumption with higher PSRR.