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Cross-sensitivity is an important parameter of an accelerometer because it directly affects the sensor's vector performance, which is paid more and more attention to. In this paper, a suite of analytical models for researching the cross-sensitivity performance of fiber-optic accelerometer is developed. The theoretical and experimental research was carried out to demonstrate the relation of the performance of a fiber-optic accelerometer based on compliant cylinder and elastic properties of the cylinders. Three kinds of silicone rubber cylinders with different Young's modulus were examined. By analyzing the cross-sensitivity models of the sensor, some characteristics of cross-sensitivity performance are revealed and discussed. Those models are useful for the design of accelerometers of such type.