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A heading angle error compensation algorithm,which deals with the existing problem of electronic compass heading angle error caused by sensor’s zero error,sensitivity error and disturbing magnetic error, is applied.The principle of compensation algorithm implementation is elaborated on the basis of analyzing the working principle of electronic compass heading angle measurement and the reasons of heading angle error formed, and this compensation algorithm is also simulated with LabVIEW.Two measurement solutions and test systems are designed at the same time,and the conclusion is drawn according to lots of measurement and verification with electronic compass of HMC1043 chip.The results show that electronic compass heading angle error that has been compensated is less than 4.5°.The compensation algorithm has a good compensation effect and is esay to implement.