In today's electronic design process, the research on signal integrity has become an important part that should not be ignored. At the early of the circuit design process, the circuit design simulation software should be used, considering the problems and resolving them to shorten the product development cycle. This paper presents the simulation waveforms in Altium Designer. Results show that different solutions lead to different signal performance. So we should adopt the best solution according to the actual conditions of the circuit design program.