目的 对国外无伞空投准备阶段关键技术的研究进展进行综述和分析，旨在促进无伞空投技术体系化发展，提高我国空投保障能力。方法 通过对相关文献的梳理和分析，详细论述了国外环境监测、精准投放和无人机自主规划技术的发展现状，在此基础上预测无伞空投准备阶段技术发展趋势。结果 国外无伞空投准备阶段技术研究是以投放的精准度为核心展开的，包括环境影响对抗、空投点预测与识别、线路自主规划等相关的检测技术、监测技术、导引技术和算法模型。结论 无伞空投准备阶段技术未来发展趋势为注重微型环境监测传感器技术，智能化处理实时数据，聚焦导航导引控制技术，确保物资投送精准可控，锚定智能飞行控制技术，开发无人机群自主投送平台以及加快无人机精确投送平台的列装，有助于推动我国无伞空投的发展。

The work aims to review and analyze the research progress of key technologies in the preparation phase of airdrop without parachute in foreign countries, so as to promote the systematic development of airdrop without parachute technology and improve China's airdrop guarantee capability. By combing and analyzing the relevant literature, the development status of foreign environmental monitoring, precision drop and UAV (unmanned aerial vehicles) autonomous planning technology was discussed in detail, and the development trend was predicted on this basis. The foreign technology in the preparation phase of airdrop without parachute was unfolded with the precision of placement as the core, including the detection technology, monitoring technology, guidance technology and algorithmic model related to the environmental impact confrontation, prediction and identification of the airdrop site, and autonomous planning of the route. The future development trend of airdrop without parachute preparation phase technology is to focus on micro-environmental monitoring and sensing technology, intelligent processing of real-time data, focusing on navigation and guidance control technology to ensure precise and controllable material delivery, anchoring intelligent flight control technology, developing autonomous delivery of UAV swarms as well as accelerating the launch of UAV precision delivery platforms, which will help to promote the development of airdrop without parachute in China.