A terminal device, comprising a charging/discharging protection circuit and a processor, wherein the charging/discharging protection circuit comprises a power supply end connected to a positive electrode of a battery, a grounding end connected to a negative electrode of the battery, an under-voltage protection threshold control end connected to the processor and configured to receive, from the processor, a first control and a second control signal and a discharging control end configured to output a third control signal; wherein the processor is configured to: when a temperature of the battery is smaller than a set temperature threshold and a discharging current of the battery is greater than a set current threshold, reduce a discharging cutoff voltage of the battery and send the first control signal; the charging/discharging protection circuit is configured to reduce an under-voltage protection threshold of the battery under the control of the first control signal; the processor is further configured to: when an output voltage of the battery is smaller than the discharging cutoff voltage of the battery, control the terminal device to be powered off, increase the discharging cutoff voltage of the battery, and send the second control signal; the charging/discharging protection circuit is further configured to increase the under-voltage protection threshold of the battery under the control of the second control signal; and the charging/discharging protection circuit is further configured to: compare the output voltage of the battery and the under-voltage protection threshold of the battery and output the third control signal according to a comparison result, wherein the third control signal is used for controlling a discharging loop of the battery to be switched on or switched off, and the discharging cutoff voltage is greater than the under-voltage protection threshold. a charging/discharging protection circuit and a processor, wherein the charging/discharging protection circuit comprises a power supply end connected to a positive electrode of a battery, a grounding end connected to a negative electrode of the battery, an under-voltage protection threshold control end connected to the processor and configured to receive, from the processor, a first control and a second control signal and a discharging control end configured to output a third control signal; wherein the processor is configured to: when a temperature of the battery is smaller than a set temperature threshold and a discharging current of the battery is greater than a set current threshold, reduce a discharging cutoff voltage of the battery and send the first control signal; the charging/discharging protection circuit is configured to reduce an under-voltage protection threshold of the battery under the control of the first control signal; the processor is further configured to: when an output voltage of the battery is smaller than the discharging cutoff voltage of the battery, control the terminal device to be powered off, increase the discharging cutoff voltage of the battery, and send the second control signal; the charging/discharging protection circuit is further configured to increase the under-voltage protection threshold of the battery under the control of the second control signal; and the charging/discharging protection circuit is further configured to: compare the output voltage of the battery and the under-voltage protection threshold of the battery and output the third control signal according to a comparison result, wherein the third control signal is used for controlling a discharging loop of the battery to be switched on or switched off, and the discharging cutoff voltage is greater than the under-voltage protection threshold.