Objective: To explore the changing characteristics of Wnt2/β⁃catenin pathway in liver regeneration and repair in C57BL/6 mice. Methods : Male C57BL/6 mice were randomly divided into a sham⁃operated group (Sham group) , 1 d post⁃operative group , 2 d post⁃operative group , 4 d post⁃operative group , 6 d post⁃operative group , and 8 d post⁃operative group. Mice in the operated group underwent partial hepatectomy ( PHx) to remove the left and middle lobes of the liver, respectively. Plasma and liver tissues were collected on postoperative days 1 , 2 ,4 ,6 , and 8 , and plasma ALT and AST activity was measured by ALT(alanine aminotransferase) and AST( aspartate aminotransferase) biochemical analysis kits; Ki67 ⁃positive cells were identified by immunohistochemistry in each group;the number of HNF4⁃α and Ki67 double positive cells , the number of LYVE1 and Ki67 double positive cells , and the number of β ⁃catenin transferred into the nucleus were determined by immunofluorescence method. The expression of Wnt2 protein in each group was detected by Western blot , and the time characteristics of its expression during liver regeneration were analyzed. Results: Liver weight and liver/body weight ratio peaked on day 6 after PHx and approached the level of the Sham group. After PHx , there was severe liver damage on day 1 , but it had normalized by day 4. On day 2 after PHx , mainly hepatocytes proliferated;and on days 4 and 6 , mainly liver sinusoidal endothelial cells proliferated ,while the Wnt2/β⁃catenin pathway was activated. Conclusion The liver has a powerful regenerative repair ability ,which is closely related to the rapid proliferation of hepatocytes and liver sinusoidal endothelial cells , and the activation of the Wnt2/β⁃catenin pathway is activated in the regenerative repair of the mouse liver.