The invention discloses a Hall element analog front-end circuit, and the circuit comprises a Hall element, a Hall element excitation source, a voltage input part, a voltage stabilizing circuit, an RFchoke circuit, a first DC blocking capacitor, a second DC blocking capacitor, a first input resistor, a second input resistor, a first feedback resistor, a second feedback resistor, a first chopper switch, a second chopper switch, a timing sequence control circuit, a transconductance operational amplifier, a Sigma_Delta modulator. The circuit finally outputs a PWM code. The Hall element which is resistant to high temperature and high in sensitivity and linearity is combined with the SOI circuit and device which are resistant to high temperature, high in speed and low in power consumption, so the circuit is resistant to high temperature, is high in sensitivity, and is high in linearity. A DC component in an output signal is effectively removed through the introduction of the blocking capacitor, and an AC component in the voltage input is effectively removed through the introduction of the RF choke circuit. The voltage stabilizing circuit can enable an input voltage of the transconductance operational amplifier to be more stable. The impact from the scintillation noise and offset voltage is effectively reduced through the introduction of the chopper switches.