Low-temperature draft reference voltage circuit

The invention provides a low-temperature draft reference voltage circuit. The circuit comprises a first voltage unit, a second voltage unit and a K-time amplification unit. The first voltage unit is used for producing first voltage, the first end of the first voltage unit is grounded, the K-time amplification unit is used for amplifying the first voltage by K times, the first end of the K-time amplification unit is connected with the second end of the first voltage unit, the second end of the K-time amplification unit is connected with the first end of the second voltage unit, and the K is a constant greater than 0. The second voltage unit is used for producing second voltage, the first end of the second voltage unit is connected to a current source circuit, and the second end of the second voltage unit is connected with the third end of the first voltage unit and then serves as a reference voltage output end. The low-temperature draft reference voltage circuit makes the relevance of output reference voltage and temperature ultralow, the structural design of the low-temperature draft reference voltage circuit is simple, few device types are needed, the design difficulty and risk are greatly reduced, and the low-temperature draft reference voltage circuit has very high practicability and universality.