The application status of flyash and the necessity of its surface modification were expounded.The basic principle,ingredient,flowsheet and modification effect were discussed.

• 本文阐述了粉煤灰的利用现状及其作为填料进行表面改性的必要性，并对改性的基本原理、配方、工艺流程以及改性效果等进行了探讨。