The invention discloses a photovoltaic field station side electrochemical energy storage charging and discharging plan making method based on a dynamic planning algorithm, and relates to the technicalfield of smooth photovoltaic power generation. The invention provides a method for reducing the influence of photovoltaic power generation fluctuation on a power grid and improving the utilization rate of energy storage resources. The method comprises the following steps of acquiring day-ahead photovoltaic power generation prediction power and basic information of electrochemical energy storage at a photovoltaic field station side; establishing a mathematical model of the electrochemical energy storage charging and discharging plan of the photovoltaic station side according to the informationby adopting a dynamic planning method, determining an objective function by taking minimization of the variance of the photovoltaic power generation curve as a target, and calculating an optimal solution of the electrochemical energy storage charging and discharging power of the photovoltaic station side. According to the method, the influence of photovoltaic power generation curve fluctuation ona power grid is reduced by changing the electrochemical energy storage charging and discharging power of the photovoltaic station side. The utilization rate of energy storage resources is improved, and the safe and stable maintenance of the power grid and economic operation of a photovoltaic power station are facilitated.