The invention discloses a method for dynamically fusing power distribution terminal function in a power distribution PMU and a storage medium. The method comprises the steps of according to specific service functions of application modules, designing the application modules into independent objects by adopting an object-oriented modeling method, and packaging and abstracting operation and data ofeach application module to obtain independent elements; configuring input, output and parameters of each element, wherein the elements comprise distribution network PMU elements and power distributionterminal elements; and linking the elements according to the input and output of each element and the parameters to realize a preset function. According to the invention, dynamic fusion of power distribution terminal functions in the distribution network PMU device is realized; elements are adopted to package operation and data of each application module; output variable synchronization data of adistribution network PMU elements are used as input variables of power distribution terminal elements to be directly used for protection function judgment; and complete decoupling of the distributionnetwork PMU elements and the power distribution terminal elements is achieved.