50?10~(9)/L. Of the patients, 3 died of liver function exhaustion or disease relapse 1-12 months after transplantation , 2 are still alive with disease for 3-5 months , but others are still alive and disease-free for 3-64 months. Conclusions:PBSCT is a safe therapeutic option that can significantly improve in acute leukemia and malignant solid tumors.