This is a dose-escalation and expansion, open label, single centre, phase Ib study. In this study, the tolerability, safety, pharmacokinetics and efficacy of irinotecan hydrochloride liposome injection in combination with 5-FU/LV were studied in patients with advanced solid tumors. Meanwhile, to determine the dose-limiting toxicity (DLT) and maximum tolerated dose (MTD) of irinotecan hydrochloride liposome.

Inclusion Criteria:

1. Histologically or cytologically confirmed solid tumors documented as advanced or metastatic disease;
2. Subjects must be considered relapsed or refractory to standard therapies, have been intolerant to standard therapies, or have refused standard therapy;
3. ECOG: 0-1;
4. Adequate organ and bone marrow function;
5. sign an informed consent.

Exclusion Criteria:

1. Patients with brain malignant tumor or active CNS metastasis;
2. UGT1A1*28 homozygous mutants;
3. Clinically significant GI disorders;
4. Significant cardiovascular disease;
5. Active infection or uncontrolled fever;
6. Pregnant or breast feeding patients;
7. Allergic to a drug ingredient or component;
8. The investigators determined that other conditions were inappropriate for participation in this clinical trial.