Objective：To establish an androgen-independent human prostate cancer cell line model LNCaP-AI. Methods: LNCaP cells were cultured in absence of hormone for a long-term to establish LNCaP cell line LNCaP-AI, which can live without hormone. MTT, immunofluorescence and RT-PCR techniques were used to study the proliferation activity of LNCaP-AI cells and expression and secretion level of PSA by LNCaP-AI cells in absence of hormone.Results: After cultured for 3 months, LNCaP cells gradually became accustomed to the non-hormone condition, showing the characteristics of androgen-independent LNCaP-AI cell line. LNCaP-AI cells rapidly proliferated under the non-hormone condition and secreted PSA.However, PSA mRNA expression level in LNCaP-AI cells was 44% that of the LNCaP cells under hormone condition.Conclusion: Androgen-independent LNCaP-AI cell line may simulate the development of androgen-independence in prostate cancer cells and is an ideal model of androgen-independent prostate cancer cell line.