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In order to enhance the security of optical encryption technology and reduce the data capacity of cipher, an optical image encryption algorithm based on chaotic Gyrator transform and compressive sensing was proposed in this paper. Firstly, the plaintext characteristics were introduced to generate the initial value of Logistic map, and the output of chaotic sequences was used to generate two measurement matrices for compressed sensing. Then, based on compressed sensing theory, the intermediate cipher was got by using the compressed sensing theory to process the plaint. Finally, the rotation angle of Gyrator transformation was calculated by using the random sequence of logistic map. Finally, the intermediate cipher was fished optical modulation by jointing random phase mask to get the final cipher. The experimental results show that the proposed algorithm has higher security and anti plaintext attack capability compared with the current optical encryption technology.