A CCD pulsed signal acquisition system for the spectral measurements in laser-induced breakdown spectroscopy (LIBS) is designed. We adopt a highly sensitive Sony ILX554B linear CCD as detector, and exploit a novel CCD driving method that can freely adjust the delay time relative to the laser pulse and the integration time of the photosensitive units in the CCD. By optimizing the delay time and the integration time, it can reduce the interference of the background emissions significantly and improve the sensitivity of LIBS. The LIBS signals of several kinds of samples under different delay times and integration time are measured, and it is shown that the system has a good performance in rapid analysis of LIBS, providing technical support to develop an inexpensive LIBS instrument.