In the operation process of the toothed roller crusher, the crushing teeth, as the direct force bearing components, continuously bear strong forces such as impact and compression applied by the material, making them the most vulnerable components to wear and tear. The condition of these broken teeth directly affects the overall working efficiency and performance of the toothed roller crusher. At present, the application scenarios of toothed roller crushers are becoming increasingly complex and diverse, such as underground mines that are not suitable for replacement and maintenance, and open-pit coal mines with a large processing capacity, which pose great challenges to the performance and convenience of crushing teeth. Therefore, a replaceable crushing tooth is designed, and the Discrete Element Method (DEM) is used as the research method to explore the crushing effect of replaceable crushing teeth in the crushing process. Meanwhile, in order to evaluate the load-bearing capacity of replaceable broken teeth, further strength analysis was conducted using finite element method (FEM).This can optimize the design of the crushing tooth structure.