The principle and problems of pulse laser finder are described. And a method of multi－cycle laser range measurement is proposed. The oscillating is generated via the received echo driving main pulse of laser, and the range is gotten by calculating the averaged time of multi－cycle of oscillating. The principle and the system structure of this method are given. And the key techniques for improving precision are also analyzed. Experiments show that this method has the advantages of low cost, high measurement speed and high precision, and suit for short distance measurement.