In order to study the influence of fiber content and fiber length on unconfined compressive strength characteristics of fiber reinforced cemented soil which was made of short-cut basalt fiber, cement and soil taken from Changchun, a series of unconfined compressive strength tests were carried out. The results show that the strength of basalt fiber reinforced cemented soil presents a generally convex curve with increase of fiber length, and the curve finally tends to be the strength of cemented soil without fiber under the same fiber contents. It shows that the fiber distribution uniformity and fiber distribution density have great influence on the strength. The strength of basalt fiber reinforced cemented soil presents a wavy curve with increase of fiber content under the same fiber length, the second wave peak value is less than the first wave peak value and the curve finally tends to a constant value. In practical engineering application, the fiber content of the first wave peak can be used in cemented soil reinforcement to achieve the expected reinforcement effect and reduce the project cost. Meanwhile, the impact of uneven mixing on the strength of cemented soil should be fully considered, and excessively long fibers should not be used. On the one hand, long fibers are easy to produce cluster phenomenon; on the other hand, they are easy to be attached to the stirring apparatus.