In recent years,the “Belt and Road” initiative has been deeply connected with Saudi Arabia's “Vision 2030”,and more and more Chinese companies have participated in Saudi Arabia's infrastructure construction.In view of the complex geological conditions and high foundation control standards in Saudi Arabia,combined with the project practices of Chinese companies in Saudi Arabia in recent years,the geological and special geotechnical conditions of the Kingdom of Saudi Arabia (referred to as “Saudi Arabia”) are summarized and analyzed.Based on this,a comprehensive evaluation method for dredging excavability and a refined control process for the fine particle content of hydraulic filling are proposed.The applicability of vibro-compaction and dynamic compaction methods for large-area sandy foundations and methods for coral reef sand foundation treatment are summarized.A foundation treatment inspection and acceptance method based on in-situ testing technology is proposed,in order to provide technical support for Chinese companies to participate in engineering construction in Saudi Arabia.