The invention discloses a photovoltaic low-voltage ride through method based on coordination control of a DSTATCOM group. The method aims at solving the problems of photovoltaic grid-disconnected operation impact on a grid under a fault condition and grid-connected impact on the grid after fault recovery. The method comprises the following concrete steps of adjusting photovoltaic terminal voltage output under the fault condition according to a relation between photovoltaic output power and photovoltaic terminal voltage to control the photovoltaic output power, stabilize voltage of a capacitor on a direct current side and allow photovoltaic operation to be in a DSTATCOM state under the fault condition, then setting an adjustment slope of each DSTATCOM according to the maximum reactive capacity of devices and reasonably distributing reactive output of each device, and finally adding a proportional gain as negative feedback based on reference voltage of the grid, forming a new voltage reference value of each DSTATCOM and establishing a DSTATCOM control strategy based on slope coordination control.