The waveform development is separated from the hardware platform based on Software Communication Architecture (SCA) Hardware Layer (HAL).HAL can separate data communication mode between waveform components from the hardware platform by shielding drive of the hardware platform and using the standard communication interface, the consistency of the communication interface at waveform component is maintained and the portability of waveform application is improved. This paper introduces the function and application interface of HAL, describes the method of realizing HAL on FPGA, and HAL’s real-time response performance was tested by the test waveform.