The invention provides a 2-fluoro-
aniline quinazoline compound labelled by F-18, wherein <18>F is produced by a circular accelerator via <18>O(pn)<18>F
nuclear reaction and automatically synthesised by a radioactive synthesis module, and can also be produced by the existing domestic F-18 multifunctional synthesis device after process reformation. The 2-fluoro-
aniline quinazoline compound provided by the invention is of an
aniline quinazoline structure substituted by 2-bit
positron nuclide fluorine-18, and can be modified on 6-bit, 7-bit and
benzene ring connected with an amino group. The invention provides novel tumour
positron imaging agents, wherein compared with <18>F-fluoro-
deoxyglucose (<18>FDG), the imaging agents are specific, and capable of identifying the tumours highly expressed by an
epidermal growth factor receptor (EGFR). The preparation method is reasonable in design, simple in
labelling method, capable of realizing automatic production, and suitable for application. The structural general formula of the 2-fluoro-aniline quinazoline compound is defined in the specification.