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The soil moisture retention capability of Chao soil and coastal saline Chao soil in Shandong and Zhejiang provinces were measured by pressure membrane method. The main factors influencing soil moisture retention capability were studied by the methods of correlation and path analyses. The results indicated that ＜ 0.02mm physical clay and soil salt content were the main factors influencing soil moisture retention capability. At soil suction of 30～50 kPa, the soil salt content would be the dominant factor.