The invention relates to a parallel connection type photovoltaic charger fault management system, which comprises one photovoltaic plate, one charging control module, one PWM (pulse width modulation) driving circuit, one backup battery, one charging main circuit, one photovoltaic voltage sampling circuit, one output voltage sampling circuit, one battery voltage sampling circuit, one fault judging and isolation control module and one output unit. The invention also provides a corresponding parallel connection type photovoltaic charger fault management method. The system and the method solve the problems that in the prior art, if one path or several paths of BUCK circuit in a photovoltaic charger system with multiple paths of BUCK circuits in parallel work fails, the system can still realize the charging, but the MPPT (maximum power point tracking) charging cannot be carried out, the energy waste is caused, and the warning cannot be provided in time.