概述了生物滴滤法的工作原理与生物滴滤塔装置，并对生物填料进行简单分类。对于单一填料存在生物亲和性、强度、孔隙率等性质不能兼容的问题，相关学者提出填料改性、优化装填等方法提高生物滴滤塔性能，降低填料压实、挂膜困难、堵塞沟流等现象的出现。目前开发新型生物填料困难重重，建议加强对填料组合、改性方法的探索。

This paper summarizes the working principle of biological trickling filter method and the equipment of biological trickling filter tower, and carries out simple classification on biological fillers. As for a single filler, there exists problems that biological compatibility, strength and porosity and other properties cannot be compatible, the relevant scholars put forward some methods such as filler modification and fillers combination to improve the performances of biological trickling filter tower, and reduce possibilities of packing compaction, difficulty in hanging film, blocking and channeling and so on. At present, the development of new biological fillers is difficult. This paper proposes to strengthen research on combination and modification of fillers.