In the research and development of EMG equipment and precision devices, as well as daily experiments such as circuit calibration and sensor application, digital multi-meter is often used to measure weak signals. However, digital multi-meters can only display the acquired signals in real time and cannot store them, which makes reading inconvenient and brings trouble for experiments and work. In order to solve this problem, a current signal acquisition system based on LabVIEW is developed. The system can display the collected waveform on the panel in real time, and store the detected accurate current data and reading time to PC. The experimental results show that the system can better display the current signal and store the signal, avoid the error of reading the digital multi-meter with the naked eye, and enhance the accuracy of reading the data.