Abstract: A novel polycyclic amide compound, preparation process and use thereof are provided. The compound has cytotoxic biological activity, particularly for the treatment and/or prevention of cell proliferative diseases such as cancer. This compound is a compound represented by Formula I or a pharmaceutically acceptable salt, solvate, polymorph, enantiomer or racemic mixture, prodrug and N-oxide thereof, wherein, R, R1-R3 are independently selected from hydrogen, C1-5 alkyl, or C1-5 having a hydroxyl group or a halogen, and may be bonded to each other to form a ring, Z is an arbitrary substituent group, X1 and X2 may be carbon or nitrogen respectively, Q is oxygen or sulfur. Compared to the existing known polycyclic amide compounds, the novel polycyclic amide compound has more potent cytotoxicity and can be used for the treatment of diseases such as tumors, cancers, Alzheimer's disease, autoimmune diseases, cataracts, psychological disorders, depression and/or anxiety.