The invention discloses a photovoltaic MPPT control circuit and a photovoltaic multi-peak quick MPP tracking method based on voltage-power scanning and belongs to the technical field of photovoltaic quick MPPT. The method comprises the four specific control steps of a scanning preparation step, a voltage scanning step, a PWM preparation step and a PWM control step. According to judgment whether ornot uC1 is 0, branch selection is conducted, if uC1 is not 0, the scanning preparation step is executed, and C1 is quick discharged; if uC1 is 0, the scanning preparation step is not conducted, and the voltage scanning step is directly started. After the voltage scanning step is completed, the PWM preparation step and the PWM control step are started in sequence. When the environment is changed,it is detected that the power is smaller than 0.9 Pmax or larger than 1.1 Pmax, the power is shown in the description, and an algorithm is restarted to search for a new global maximum power point. According to the method, interference of local power peak values can be effectively eliminated, and under a local shadow complex environment, the global maximum power point is effectively identified, tracked and locked.