Abstract: In order to realize wide range indoor environment laser ranging, a high speed laser ranging system was designed by the principle of trigonometric ranging. Environmental informations were collected with a high resolution linear CCD sensor, and the binary signal was output. The binary signal was processed by a 32-bit single chip microcomputer. The distance between laser spot and lens center of the ranging module was obtained according to the distance obtained by the piecewise fitting method. After the experimental verification, the results show that the rangefinder has the measurement frequency of 714Hz. The maximum measurement distance is 6311mm and the minimum measurement distance is 48mm. The average error is 2.8mm and the maximum measurement error is 11mm. The distance measurement system can meet the requirements of large-scale indoor environment measurement.