Circuit board

The utility model discloses a circuit board which comprises a substrate and a keypad, wherein the substrate is provided with a main control area which is used for realizing electrical performance, the keypad is provided with key bridges and keys, the keypad and the main control area are covered with a peelable blue gum which is used for protecting the key bridges and the keys. The circuit board comprises the substrate which is provided with copper foils as conducting circuits, the copper foils are provided with carbon oil which is covered with a peelable blue gum. Weld resisting green oil is arranged between the copper foils. The circuit board is stuck with the peelable blue gum on the keypad and/or the main control area, thereby adhesive tapes are not required, welding connection is resisted, and the key bridges and the keys are protected from sticking tin and being impacted by soldering tin.