Abstract:In recent years, with the advent of the era of big data, numerical computing affects all aspects of the various fields. In our country, traditional design method of software development for small to medium sized projects generally have the elements of project introduction domain narrow, project anticipated effect logic assess sex differences, slow processing analysis, etc. Based on the status quo of traditional design method of software development for small to medium sized projects,based on MRUP of small and medium-sized project design method of software development. Big data using MRUP engine, dynamic MIFGL project evaluation algorithm and multipath processing operation module, to form a complete set of three-dimensional design method. Experiments show that the proposed software development and design for small to medium sized projects based on MRUP has wide coverage of project analysis elements, fast analysis, project estimate of the characteristics of high accuracy.