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In order to study the shear strength characteristics of polypropylene fiber-reinforced cement aeolian sand, the orthogonal test method was used to conduct unconsolidated undrained triaxial (UU) test to study the effects of fiber content, fiber length, cement content, and water content on the shear strength of fiber-reinforced cement aeolian sand. The results show that the main and secondary factors influencing the shear strength of fiber-reinforced aeolite sand are cement content, fiber length, water content, and fiber content.The optimal test ratio is cement content 10%, fiber length 12 mm, water content 8% and fiber content 0.2%. The peak stress and strain of cement eolian sand can be significantly increased by adding the appropriate amount of fiber into the sample. The cohesion increases first and then decreases with the increase of fiber content, and increases with the increase of fiber length. The influence of fiber content on internal friction angle is small. The research results can provide the scientific basis for the prevention and treatment of fiber-reinforced cement eolian sand roadbeds. [ABSTRACT FROM AUTHOR]