Silicon nitride-based ceramic tools are considered ideal for cutting high-temperature alloys because of their superior hardness

wear resistance and high-temperature stability. However

their lack of toughness limits wider applications. To overcome these challenges

researchers have introduced a variety of reinforced phases into the Si

3

N

4

-based ceramic tool material system to enhance its comprehensive mechanical properties

and these studies provide theoretical guidance for the design and application of Si

3

N

4

-based ceramic tools. In this paper

a detailed review of

domestic and foreign for Si

3

N

4

-based ceramic tool material toughening methods

especially focusing on summarizing the improvement effects and mechanisms of various reinforced phases relative to Si

3

N

4

-based ceramic tool material mechanical properties; on this basis

this paper summarizes the current status of the application of Si

3

N

4

-based ceramic tools in cutting hightemperature alloys in recent years

and the research direction of Si

3

N

4

-based ceramic tool material system and tool cutting performance is prospected.