【目的】 土壤动物在凋落物分解、土壤有机质形成和理化性质调节中具有重要生态功能。本研究针对传统Tullgren漏斗成本高、体积大、重量沉及组装复杂等问题，创新性地设计出基于倒置矿泉水桶组装的轻简化土壤动物分离装置。【方法】 通过比较40与15 W光热源下轻简化土壤动物分离装置与传统Tullgren干漏斗分离土壤动物的分离效果，系统评估轻简化装置对土壤动物的分离效果。【结果】 （1）结构性能方面，轻简化装置具有显著的成本优势（降低约80%）、重量/体积均减少约75%，且操作简便；（2）分离效能上，40 W光热源下，传统装置分离土壤动物总量显著高于轻简化装置（P < 0.05），而15 W条件下二者差异不显著（P > 0.05）；（3）在草地、农田和林地土壤优势类群（主要是螨类与弹尾类）的分离数量无显著差异（P > 0.05）；（4）时间动态特征显示，40与15 W条件下的有效分离窗口期分别为4-6和12 h。【结论】 采用15 W光热源的轻简化装置可在维持核心分离效能的前提下，显著提升野外工作的经济性与便捷性，适用于野外生态调查的即时样本处理需求。

[Aim]  To assess whether a simplified, and significantly cheaper, soil fauna extraction device made from inverted water bottles could be a viable alternative to the traditional Tullgren funnel, which has the disadvantages of high cost, bulky size, heavy weight and complex assembly. [Methods]  The performance of the simplified, lightweight soil fauna extraction device was compared to that of the traditional Tullgren funnel under both 40 W and 15 W photothermal sources. [Results]  (1) The lightweight, simplified funnel was significantly (~80%) cheaper, ~75% lighter and smaller in volume, and much easier to operate. (2) Although the Tullgren funnel extracted a significantly higher number of soil fauna under 40 W conditions (P < 0.05), there was no significant difference between tunnel types at 15 W (P > 0.05). (3) Furthermore, no statistical differences (P > 0.05) were found in the numbers of the dominant soil fauna groups (mainly mites and collembolans) extracted from grassland, farmland, or forest, soils. (4) The time intervals required for effective extraction were, 4-6 h (40 W) and 12 h (15 W). [Conclusion]  This study demonstrates that a lightweight, simplified soil fauna extraction device with a 15 W photothermal source has similar performance to a traditional Tullgren funnel, while at the same time being significantly cheaper, lighter, and easier to assemble and use. The simplified soil fauna extraction device is suitable for immediate on-site sample collection in ecological field surveys, particularly in remote areas.