Abstract: Among the existing motheds of generating distance simulation pulses, digital delay circuit can only achieve the accuracy of ns order, while analog delay circuit does not have enough delay range used as distance simulation pulse. In order to realize delay of high precision and large dynamic range to produce the distance simulation pulse of laser range finder, based on the analysis of the current circuit, the circuit structure combining both the digital circuit and analog circuit was proposed in this article, which would satisfy both the high accuracy and large dynamic range. Its accuracy and repeatability were tested, and the results can reach 2 s-4 ms range of delay and 0.1 ns delay precision, which can simulate the distance of 300 m-600 km and achieve the distance accuracy of 1.5 cm. The method of generating distance simulation pulse proposed in this article can solve the problem of incapable of achieving high precision and large dynamic range simultaneously, existing in current distance simulation circuit.