The influences of fiber kind,fiber length and fiber content for fiber reinforced soil shear strength were analyzed by orthogonal test. The experimental results show that fiber kind and fiber content are the main factors affecting the shear strength of fiber soil,the fiber length has little effect on the shear strength of fiber soil. In three kinds of fiber,the cohesion of polypropylene fiber is the biggest,and the internal friction angle of carbon fiber is the largest.%通过正交试验，对纤维种类、纤维长度以及纤维掺量对纤维加筋土抗剪强度的影响进行了分析，试验结果表明：纤维掺量和纤维种类对纤维土抗剪强度指标影响较为显著，纤维长度对纤维土的抗剪强度指标影响较小，三种纤维中，聚丙烯纤维的粘聚力最大，碳纤维的内摩擦角最大。
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