The invention provides a distributed photovoltaic cluster control method and device. The distributed photovoltaic cluster control method comprises the steps of acquiring an active power of a distributed photovoltaic cluster and running data of a power distribution network; solving a hybrid integer second-order cone planning model by a solver, and controlling the distributed photovoltaic cluster according to a calculation result; and building the hybrid integer second-order cone planning model according to the active power of the distributed photovoltaic cluster and the running data of the power distribution network so that global optimal solution with low difficulty, high efficiency and high accuracy can be effectively solved. With the distributed photovoltaic cluster control method provided by the technical scheme of the invention, the photovoltaic output fluctuation can be effectively handled, the running safety of the power distribution network is ensured, and local absorption of distributed photovoltaics is achieved. The distributed photovoltaic cluster control method provided by the technical scheme of the invention employs a second-order cone loosing method to convert a non-convex non-linear constraint in power flow constraint to linear constraint in the hybrid integer second-order cone planning model, and the calculation efficiency is greatly improved.