Disclosed are a 99mTc-labelled isonitrile-containing glucose derivative of the structural general formula [99mTc-(CNDG)6]+ and a preparation method and the use. The derivative takes 99mTc+ as a central core, and the isonitrile carbon atom in the CNDG and 99mTc(I) coordinate to form a six-coordinated complex [99mTc-(CNDG)6]+. The [99mTc-(CNDG)6]+ derivative is obtained through the synthesis of the ligand CNDG and the preparation of a CNDG freeze-dried medicine box. The derivative of the present invention has good stability and is easy to prepare, has a high uptake and good retention on a tumour site, has a high tumour/non-target ratio, and is a high-performance new type 99mTc-labelled isonitrile-containing glucose derivative useful for tumour imaging, which is easy to popularize and apply.
