This study is to investigate the effect of Icogenin on and its mechanism in anti-metastasis of pan- creatic cancer BxPC3 cells in vitro.  Using transwell assay, the effects of Icogenin on the invasion of BxPC3 cells were measured.  The abilities of cell motility and adhesion in BxPC3 cells were detected by MTT assay and wound healing assay, respectively.  The MAPK signal pathway protein expressions were analyzed with Western blotting.  Also, the activity of MMP2 was observed by zymography assay.  Icogenin inhibited the abilities of motility, adhesion and invasion of pancreatic cancer BxPC3 cells in vitro (P < 0.05), in a dose-depended manner, and inhibited the secretion of MMP2 and phosphorylation of ERK.  PD98059 and U0126 which were ERK   inhibitors could suppress the abilities of invasion and metastasis of pancreatic cancer BxPC3 cells.  It is    concluded that Icogenin can inhibit the abilities of invasion and metastasis of pancreatic cancer in vitro by    inhibiting the secretion of MMP2 and phosphorylation of ERK.