Low power consumption reference circuit applied to passive UHF RFID label chip

The invention discloses a low power consumption reference circuit applied to a passive UHF RFID label chip. The low power consumption reference circuit applied to the passive UHF RFID label chip is composed of a positive temperature coefficient (PTC) current circuit, a negative temperature coefficient (NTC) current circuit and a reference voltage output circuit, wherein the PTC current circuit is used to generate a PRC current I+, the NTC current generation circuit is used to generate an NTC current I-, and the reference voltage output circuit generates zero temperature coefficient (ZTC) voltage Vref. The low power consumption reference circuit applied to the passive UHF RFID label chip has the advantages of being capable of automatically starting, causing no difference amplifying, and being low in work voltage and low in power dissipation.