阐述了组合秤的工作原理及基本结构，并基于LabVIEW对组合计算进行了仿真程序设计，从而得出了组合秤在不同的组合方式、组合模型和标准差下的合格率。对仿真结果进行了分析，得出了组合秤合格率与组合方式、组合模型及标准差有关。通过对组合秤的组合原理的优化，提高了组合秤的合格率。

The working principle and basic structure of combined balance was introduced. Simulation program of combinatorial calculation was compiled based on LabVIEW, so as to get the pass rate of combined balance in different combination modes, different combination models and different standard deviation. The simulation results were analyzed and it was concluded that the pass rate of combined balance has something to do with combination mode, combination model and standard deviation. Then the pass rate of combined balance was improved by optimizing combinatorial principle of combined balance.