Abstract: A dual-modality nanoprobe targeting glioblastoma and preparation method thereof are described. The dual-modality nanoprobe of the present disclosure comprises DSPE-PEG(2000)-Amine, superparamagnetic iron oxide nanoparticles (SPIONs), Cy7-NHS molecule, targeting polypeptide and/or trans-mirror structure (i.e., enantiomer) thereof. The dual-modality nanoprobe can integrate the advantages of magnetic resonance and fluorescence imaging and thus provide clearer anatomical structure information of brain tumors; in the imaging process, the dual-modality nanoprobe can not only provide clearer image results, but also can specifically identify target sites. Also, the dual-modality nanoprobe of the present disclosure also has good in vivo stability.