In this paper,in view of the laser short range omnidirectional dynamic detection problem,the mechanism of the influence of the target echo characteristics is investigated from the theoretical derivation and experimental analysis,respectively.Based on the laser dynamic scanning detection mechanism and the laser near field detection theory,the target echo profile waveform equation based on the laser dynamic detection mechanism is derived.The results show that with the increase of transmission power,the amplitude of echo signal increases greatly and the pulse width is compressed.As the pulse width of the laser emission increases,the echo signal amplitude shows a rapid decrease and the pulse width broadens.As the beam divergence angle increases,the echo amplitude decreases slowly and the pulse width broadens.And as the target distance increases,the amplitude of the echo signal decreases rapidly and the pulse width broadens.