In order to improve the effect of ecological smart city construction, this paper analyzes the application of the ecological economic model based on parallel accumulation sorting and dynamic Internet of Things in the construction of ecological smart city. Moreover, this paper studies the core technology algorithm of information retrieval, proposes a parallel accumulation sorting algorithm, and combines the dynamic Internet of Things and ecological economics to construct an ecological smart city construction model. In addition, on the basis of constructing an ecological smart city, this paper combines the parallel accumulation sorting algorithm and the dynamic Internet of Things technology to analyze the construction effect of the ecological smart city. The experimental research results show that the ecological economic model based on parallel accumulation sorting and dynamic Internet of Things has a good application effect in the construction of ecological smart city.