A DC/DC converter comprising a DC/DC conversion circuit, an overshoot detection apparatus, a pulse width modulation generator, an error amplifier,a soft start voltage unit, a constant voltage reference and an integration circuit connected to an output port of the error amplifier, wherein the DC/DC converter optionally further comprises an overcurrent protection circuit, and the overcurrent protection circuit is connected to the overshoot detection apparatus and configured to output an overcurrent signal to the overshoot detection apparatus when the overcurrent protection circuit is triggered, wherein the error amplifier is configured to: amplify a difference between an output voltage of the DC/DC conversion circuit and a reference voltage to generate an amplified voltage, and output the amplified voltage to the pulse width modulation generator; the DC/DC converter is configured such that during a soft start process, the reference voltage is the soft start voltage and when the soft start ends, the reference voltage is the constant voltage reference; the pulse width modulation generator is configured to: generate a pulse width modulation wave based on the amplified voltage, and output the pulse width modulation wave to the DC/DC conversion circuit; the DC/DC conversion circuit is configured to control the output voltage of the DC/DC conversion circuit based on the pulse width modulation wave; the integration circuit is configured to: perform integration processing on the difference between the reference voltage and the output voltage, and control an amplitude of the amplified voltage that is input by the error amplifier to the pulse width modulation generator; and wherein the overshoot detection apparatus is configured to: obtain an operating status parameter of the DC/DC converter only once it has been determined that the soft start voltage of the DC/DC converter is greater than or equal to a preset voltage threshold, set the soft start voltage slope to the initial soft start voltage slope when the operating status parameter of the DC/DC converter does not meet an operating status parameter requirement, and reduce the soft start voltage slope of the DC/DC converter and control the integration circuit to discharge when the operating status parameter of the DC/DC converter meets the operating status parameter requirement, and, optionally, when a quantity of times of receiving the overcurrent signal output by the overcurrent protection circuit within a first preset duration is greater than or equal to a preset quantity threshold, wherein the operating status parameter is at least one of: the voltage difference between the reference voltage and the output voltage, the amplified voltage, and a duty cycle of the pulse width modulation wave. the DC/DC converter optionally further comprises an overcurrent protection circuit, and the overcurrent protection circuit is connected to the overshoot detection apparatus and configured to output an overcurrent signal to the overshoot detection apparatus when the overcurrent protection circuit is triggered, wherein the error amplifier is configured to: amplify a difference between an output voltage of the DC/DC conversion circuit and a reference voltage to generate an amplified voltage, and output the amplified voltage to the pulse width modulation generator; the DC/DC converter is configured such that during a soft start process, the reference voltage is the soft start voltage and when the soft start ends, the reference voltage is the constant voltage reference; the pulse width modulation generator is configured to: generate a pulse width modulation wave based on the amplified voltage, and output the pulse width modulation wave to the DC/DC conversion circuit; the DC/DC conversion circuit is configured to control the output voltage of the DC/DC conversion circuit based on the pulse width modulation wave; the integration circuit is configured to: perform integration processing on the difference between the reference voltage and the output voltage, and control an amplitude of the amplified voltage that is input by the error amplifier to the pulse width modulation generator; and wherein the overshoot detection apparatus is configured to: obtain an operating status parameter of the DC/DC converter only once it has been determined that the soft start voltage of the DC/DC converter is greater than or equal to a preset voltage threshold, set the soft start voltage slope to the initial soft start voltage slope when the operating status parameter of the DC/DC converter does not meet an operating status parameter requirement, and reduce the soft start voltage slope of the DC/DC converter and control the integration circuit to discharge when the operating status parameter of the DC/DC converter meets the operating status parameter requirement, and, optionally, when a quantity of times of receiving the overcurrent signal output by the overcurrent protection circuit within a first preset duration is greater than or equal to a preset quantity threshold, wherein the operating status parameter is at least one of: the voltage difference between the reference voltage and the output voltage, the amplified voltage, and a duty cycle of the pulse width modulation wave.