In　a　cloud　database　environment,　data　is　usually　encrypted　and　stored　to　ensure　the　security　of　cloud　storage　data.　To　overcome　the　shortcomings　of　encrypting　the　data　that　the　query　overhead　is　big,　the　cipher　text　sortings　and　query　are　not　support,　etc,　this　paper　puts　forward　a　kind　of　f　-　mOPE　cryptograph　database　retrieval　scheme.　Based　on　the　mOPE　sequential　encryption　algorithm,　the　idea　of　binary　sort　tree　data　structure　is　used　to　generate　plaintext　one-to-one　corresponding　sequential　coding.　Data　plaintext　is　converted　into　ciphertext　storage　based　on　the　AES　encryption　scheme.　The　improved　partial　homomorphic　encryption　algorithm　is　used　to　improve　the　security　of　sequential　encryption　scheme.　The　security　analysis　and　experimental　results　show　that　this　scheme　can　not　only　resist　statistical　attack,　but　also　reduce　effectively　server　computing　cost　and　improve　database　processing　efficiency　on　the　basis　of　guaranteeing　data　privacy.　©　2019,　Science　Press.　All　right　reserved.