The restoration of the stone tool making process is an important part of the archaeological research of the Paleolithic Age, in which assembly analysis is an important method.Traditionally, the restoration of stone tools is usually done manually. However, the large number of stone tool fragments requires a lot of manpower and time. In order to complete these tasks more efficiently, this paper studies geometric processing technology combined with the knowledge of experts, and develops related algorithms for the reassembly and visualization of stone tools. First, based on the stone core, the making process is restored by matching the cracked surface of the stone flake with the scar surface on the chipped surface of the stone core. After the matching is