The construction process of project group is full of uncertain factors, large numbers of resources are required, and it is easy to lack of certain resources. Based on programming theory, the project group resource reallocation optimization model is established when supplied resource quantities are insufficient. By applying programming theory, a linear programming model including labor, material resource reallocation is established, it regards the shortest delaying construction period and minimum extra increased cost as the objective function. It guarantees the rational reallocation of resources. Through actual example analysis, how to optimize the configuration of the actual project group when the situation in which insufficient resources supply occurs is vadilated.