A portable bottle for pet includes a bottle body and a bottle lid. The upper end of the bottle lid has a flexible bowl member which is capable of being selectively unfolded or downfolded, wherein the bottom portion of the bottle lid is connected with the bottle body. The bottle lid comprises a movable blocking arrangement. An upper end of the movable blocking arrangement is connected to the liquid port of the bottom portion of the flexible bowl member and the lower end of the movable blocking arrangement is connected to a supplying pipe in the bottle body. The functions of the portable bottle for pet integrates bottle and bowl, providing a good ability of preventing leaking out, sealing during porting, blocking water during drinking, and enabling water flowing back to the bottle body so as to reduce the waste of water.