中文摘要：

基于国内外慢滤技术的发展现状，综合阐述了近年来生物慢滤的理论和技术。分析表明生物慢滤的原理逐渐深入、工艺技术日趋完善、净水效果显著、影响因素明确。同时结合贵州喀斯特农村地区饮水瑰状，从需求、技术、经济和需解决的关键问题上分析了生物厦滤技术在喀斯特地区应用的可行性。

英文摘要：

Based on the current situation of slow sand filtration technology at home and abroad, the theory and technology of slow sand filtration in recent years was comprehensively expounded. Analysis results showed that the principle of slow sand filtration became clear, the improvement of technology became better, the water-purification effect was remarkable and the influencing factors in purification was definite. At the same time, the authors pointed out that there is feasibility of application bio-slow sand filtration in karst rural area of Guizhou Province by analyzing the needs, technology, economy and key problems need to be solved in combination with the present situation of drinking water in Guizhou rural area.