The invention discloses a real-time spatial displacement measurement system based on a linear array CCD. The system includes a three-dimensional real-time positioning device, an LED group placed in atested point, and an integrated data collecting and processing device. The three-dimensional real-time positioning device is composed of three one-dimensional image acquisition units of which the axesform a certain angle and are fixed in three equidistant positions. Each one-dimensional image acquisition unit is composed of a cylindrical lens and a linear array CCD of which the center axes are perpendicular to each other. The real-time spatial displacement measurement system based on a linear array CCD can be used to measure the spatial displacement in real time, can improve the precision andreal-time performance of real-time spatial displacement measurement, and meets the measurement requirements of the attitude angle, trajectory, vibration and other parameters of a model in low-speed wind tunnel test.