This project studies The application of the linear programming. For a time at least, of formwork pole size 4x4 inches each set together. For use in production planning to store construction materials. For a case study Chor. Phet Starting from the study of the production process, Restrictions on production and data requirements in each month. Then change the problem, in the form of linear programming problems with conditions. Then the solution with LINGO V.11. By the way the results are presented to a great extent. Make time to use formwork decreased Compared to the total time in the mold of the shop today Compared with the total time used in casting of the shop today Find that can reduce the total time used in casting down from the original, 7,180.16 minutes per month. Reduced, 6,546.43 minutes per month Representing 8.83 %. Which can reduce the cost 595.71 per month or 7,148.47 baht per year