This paper presents a new algorithm for center extraction of line structured laser light. This algorithm is based on the maximally stable extremal regions (MSER) algorithm to extract the stripe effective regions quickly and efficiently, which takes advantage of the feature that the stripe region has high contrast with the background region. Based on the idea of scanning only the effective area of the light strip, the traditional algorithm is easy to be affected by noise and low detection efficiency in the scanning process of image redundancy information. In addition, the gray center of gravity method was used to extract the center of effective light stripe regions detected by MSER in view of the deviation error of the center of light stripe caused by the different number of laser stripe cross sections involved in the calculation. Experimental results show that the proposed algorithm can quickly extract the center of the strip, which is nearly 19 times faster than the Steger algorithm, and this proposed algorithm has high anti-noise performance.