讨论了支承力法（即用测力传感器直接监测大型汽轮发电机组四可倾瓦轴承负荷的方法）的原理和误差，介绍了轴承试验台结构及其测试系统，并在试验台上进行了四可倾瓦轴承负荷测试试验研究和误差分析。试验结果表明，支承力法有较高的测试精度，它的综合误差小于５％，可满足工程测试要求。 The principle and error of the bearing force method (ie, the method of directly monitoring load of four-tilting pad bearing of a large-scale steam turbine generator set with a load cell) are discussed. The structure of a bearing test stand and its testing system are introduced and carried out on a test stand Test and Error Analysis of Four Kilowatts Bearing Load Test. The test results show that the supporting force method has higher testing accuracy, and its integrated error is less than 5%, which can meet the engineering test requirements.