A demountable showerhead with tearing mode has backstop mouths arranged on an outlet surface of a shower. Each backstop mouth is disposed with an outlet waterway to connect to the waterway of the shower. The outlet waterway has a big and small end, and is contracted along the outlet direction of the shower, and a flexible cover, which comprise bowl shape plugs and a flexible connector connected to the bowl shape plugs; each plug has a big and small end, the small end of the plug is connected to the connector, the big end of the bowl shape plug is deformed and plugged into the small end of the backstop mouth, the external wall of the plug is coupled to the outlet waterway in elastic way; the internal wall of the plug is contracted along the outlet direction, the bottom of the external wall is disposed with outlet holes.