A low voltage, low power, moderate-precision bandgap reference was presented. An improvement was made on the bandgap reference with resistive subdivision structure, in accordance with its defects in the low-voltage application. The whole structure is simple and the circuit is easy to modulate, and the power dissipation is limited as far as possible. The bandgap reference was implemented in UMC 0.18 μm mixed mode 1.8 V CMOS technology. Measurement results show that the circuit has an accuracy of 20 × 10~(-6)/℃ at -20 ℃ to 130 ℃ with 1 V voltage supply and a power supply rejection ratio (PSRR) of -54 dB at low frequency. Its total power dissipation is only 3 μW with 1 V voltage supply.