In order to meet the needs of safety control and construction quality control of distribution network construction, and effectively improve the site management and control ability of distribution network engineering, Combining site control technology of distribution network engineering with wireless handheld terminal technology, this paper proposes the overall architecture design scheme of the handheld terminal system applied to site control of distribution network engineering. The constructed distribution network engineering control APP and support system cover the whole process control of project management, pre-construction, construction process and project completion acceptance. Through the distribution network engineering control APP design proposed in this paper, it can not only discover the safety hazards in the construction site of the distribution network in time, but also effectively avoid the occurrence of safety accidents, and effectively monitor the distribution network project to ensure the construction of distribution network project to meet the requirements of standardization construction. This paper provides a certain theoretical guidance for the construction of ubiquitous power internet of things in China.