Highway bridge loading test generally refers to the final acceptance of construction of bridges and loading tests for bridges in service or after technical transformation. At present, a large number of old bridges exist in our country and many new bridges are being built. Whether those bridges can be used safely is closely related to the safety of people. Therefore, loading test for bridges is definitely of great importance.When carrying out loading tests, arrangement of vehicles is one of the main tasks, which should meet requirements of efficiency of static load test and load limits as well as economical cost. To solve this problem, the authors refer to Load Testing Specifications for Highway Bridges and develop a new method for automatic output of load arrangement based on influence-line loading and realize it in BLT.