The paper discusses the development of a database, containing information on Russian prepositional phrases. The study is conducted as a part of a project, aimed at the construction of quantitative grammar of Russian prepositional phrases. Source data is based on the material from several corpora (Araneum Russicum Minus, Russian National Corpus subcorpora) and the result of its semantic processing. At this point 4200 cases of prepositional usage of twenty-five primitive prepositions are annotated. We created a database based on a sample of this data. By structuring and integrating the accumulated material into a database we optimize the process of extracting statistical characteristics, as well as information on exercised meanings of a preposition in a wider context. We also have the opportunity to compare the statistics of the texts of different genres. In the paper we examine the peculiarities of the material of prepositional semantics, justify our views on structure of such database, give the examples of queries. Preliminary results suggest the feasibility of further work.