In order to understand the influence of laser process parameters on the geometric characteristics of the H13 powder layer remanufactured on the surface of H13 steel,a experiment is designed to explore the influence of laser power and laser spot size on single cladding layer′s geometric characteristics,including the height and width of the cladding layer,the depth and width of the melting pool.The effects of these process parameters on cladding layer′s geometric characteristics are concluded.The main influence factors of each geometric feature are analyzed by the range analysis method.A mathematical model of laser cladding layer′s geometric characteristics is used to validate the results of the experiments.The experiment results show that the laser spot size is the parameter with more obvious effects on the width of cladding layer,the width and depth of matrix melting zone,while the influence of laser power and spot size on the clad height has no significant difference； in addition,the comprehensive utilization rate of powder first increases and then remains unchanged with the increase of laser energy density.