You can add vertical align to the mat-icon element or .mat-icon class: To override all material icons: Stackblitz ... <看更多>

A 24px icon inside a 40px mat-icon-button by default ends up with 9... ... .mat-button-wrapper { display: flex; justify-content: center; }. ... <看更多>

Then use it like this in you component scss */ mat-icon { @include ... As a side note: You can center the mat-icon with a parent wrapper and ... <看更多>