The invention relates to the technical field of power distribution networks, and particularly discloses an architecture method of a power distribution network design platform. The method comprises 1)erecting a database at a server side; 2) enabling a client to write an application program; 3) collecting the data of the server side into a mirror image database; 4) enabling the client to use a distribution network drawing module to collect data in a drawing database for engineering drawing; 5) exporting the drawing engineering data by using a distribution network drawing module, and linking toa distribution network material preparation module through an interface database; 6) enabling the distribution network material preparation module to export a budget material table and a purchase material table by using a design database and a material library; 7) making a budget book. According to the invention, the maintenance of data is handed over to the server side, so that the workload of each designer for independently arranging data offline is reduced; meanwhile, the server side maintains the quantity, and the client side directly applys, so that the standard design and the rapid transfer application of materials are accelerated, the unified management of the design work of the power distribution network is facilitated, and the workload of the designer is reduced.