The invention discloses a cancer therapeutic medicine capable of killing medicine-resistant tumor cells and tumor stem cells in chemicotherapy and an application thereof. The medicine is characterized by comprising the following components: the liquid medicine in every 100 milliliters contains 2-10ml of absolute ethyl alcohol, 40-50mg of cis-platinum complexes and 90-98ml of sterile water. The medicine is mainly used for local injection of tumors or intravesical therapy of chest, abdomen, pericardial cavity malignant effusion or aerosol inhalation therapy of lung tumors, and is suitable for the therapy of various solid tumors such as lung cancer, liver cancer, pancreatic cancer, ovarian cancer, cervical cancer, mammary cancer, retroperitoneal tumor or retroperitoneal lymph node metastasis, cardia cancer, gastrointestinal malignant cancer, soft tissue sarcoma, glioma and head and neck neoplasm and the medicine-resistant or medicine-sensitive tumor therapy with chest, abdomen, pericardial cavity malignant effusion.