The ActiveX technology has the advantages of good inheritance and crossplatform use. A set of data waveform display controlsthe Graph control has been developed by the ActiveX technology in this paper. The control encapsulates the data calculation, waveform display, coordinate measurement and other functions, which reduces the workload of the software developers and is suitable for gyrotesting software. The Graph control was divided into four modules: scale calculation, waveform display, and coordinate measurement and transformation, and other functions, and the key technologies of the four modules were introduced. The actual applications prove that the control is convenient to use, rich in functions, good in reliability, and has high engineering practical value.