Abstract: An uninterruptible portable power bank, including: a portable power bank, the PWM charge and discharge control circuit is coupled to the AC to DC transformer circuit, the battery and the protection circuit module and the DC to AC transformer circuit, the automatic power switch is coupled to the first AC power transmission interface, the AC power output interface and the DC to the AC transformer circuit, the AC to DC transformer circuit is coupled to the first AC power transmission interface, the automatic power switch is connected to the first AC power transmission interface and the AC power output interface while connected with the wall power, and turn to connect to the DC to AC transformer circuit and AC power output interface while the wall power is cut off; and an AC power transmission cable having a second AC power transmission interface and a second wall power input interface.