The morphology of ends of single-track laser cladding layer has an important influence on the processing precision and stability in laser solid forming. Based on the principle of powder accumulation, the formation process of ends of single-track laser cladding layer is analyzed. An analytical model of constructing the ends is developed. Some single-track laser cladding layers are prepared. By laser scanning confocal microscope, the ends of single-track laser cladding layers are observed. And the profiles of a series of cross section along the scanning direction and longitudinal section are measured. The result indicates that the width/height of the ends increase inward along the scanning direction. Beyond the distance of the radius of molten pool, the width of the ends equal to the one of the cladding layer and keep stable. Moreover, the height of the zone out of the initial/tail molten pool reaches stable while the one in the initial/tail molten pool keeps increasing. Between those two zones, a boundary of broken line is formed. Beyond the distance of the length of molten pool, the cross section of laser cladding layer reaches stable. The constructed result shows good agreement with the experimental one in the main geometry characteristics, which indicates the powder accumulation is the primary mechanism in determining the morphology of ends of single-track laser cladding layer. The developed model provides a foundation to get insight into the morphology of ends of singletrack laser cladding layer.