The present invention belongs to the field of biomedicine and relates to use of VCP (valosin-containing protein, VCP) inhibitor and oncolytic virus in the preparation of an anti-tumor drug. The present invention firstly discovers that VCP inhibitor can be used in the preparation of an anti-tumor synergist for oncolytic virus. Meanwhile, the present invention relates to a pharmaceutical composition comprising VCP inhibitor and oncolytic virus, a pharmaceutical kit comprising VCP inhibitor and oncolytic virus, and use of VCP inhibitor and oncolytic virus for treating tumor, especially a tumor that is not sensitive to oncolytic virus. The present invention also relates to an anti-tumor administration system, characterized in that, comprising oncolytic virus and a reagent for detecting the expression level of VCP.