Nab-PCE vs PC for MM After Failure of Anti-PD-1

Inclusion Criteria: 1. Age ≥ 18 years old, ≤ 70 years old, male or female; 2. Histological or pathological diagnosis of advanced melanoma, and progressed after anti-PD-1 treatment (disease progression or unacceptable toxicity); 3. The patient has at least one (RECIST 1.1 standard) measurable lesion, which needs to be detected by spiral CT or MRI, and the tumor lesion has at least one single diameter ≥ 1 cm; 4. ECOG PS is 0 or 1 (see Annex 1 for standards); 5. The estimated survival period is ≥12 weeks; 6. no chemotherapy contraindications, including normal peripheral blood, liver and kidney function and electrocardiogram are basically normal; Peripheral blood: neutrophils ≥1.5×109/L, platelets≥90×109/ L, hemoglobin≥90 g/L; Renal function: normal serum creatinine; For patients with non-metastatic liver function impairment: alanine, aspartate aminotransferase ≤ 2.5 ULN, For patients with metastatic liver dysfunction: alanine, aspartate aminotransferase ≤ 5 ULN; 7. Patients who have undergone topical treatment for asymptomatic brain metastases can be enrolled and have a clinical stable status of at least 4 weeks. 8. Patients voluntarily participate in and sign an informed consent form. 9. contraindications for the use of no carboplatin, paclitaxel, entropic and albumin paclitaxel Exclusion Criteria: 1. Known HIV, hepatitis B/C virus positive status or history of active tuberculosis (testing prior to randomisation is not required) 2. Received any investigational drug within 28 days or 5 half-lives of the planned first dose of this study treatment. 3. Active infection requiring systemic therapy. 4. A known history of another malignancy or concurrent malignancy unless the patient is disease-free for a minimum of 1 year, is completely treated and is at low-risk of recurrence. 5. Patients with a history or evidence of cardiovascular risk, 6. History or evidence of interstitial lung disease or active non-infectious pneumonitis. 7. Serious or unstable pre-existing medical conditions or other conditions that could interfere with the patient's safety, consent, or compliance. 8. Pregnant or breastfeeding females, or expecting to conceive or father children within the projected period of study treatment (52 weeks followed by 4 months following end of study treatment).