There are more and more requirements for measuring the minor distance in industrial application. However, the common ultrasonic ranging, infrared ranging, etc. are not suitable for the short distance cases. In this study, according to the active vision theory and the basic triangulation measurement principle, the circuits of micro controller acquisition for PSD drive, I/V conversion, amplifier and filter are designed. Two signal of voltage outputs are achieved. The corresponding software are used to process the signal acquisition and software filtering. By using the nonlinear fitting method, the laser ranging sensor are acquired at last. The real measurement confirm that the error of the result less than 1% within 20~60 mm. In conclusion, this design can be used for the measurement of short distance in industrial field.