Rigid-flex circuit board is made of rigid circuit board and flex circuits which combines the rigidness of PCB and flexibility of the flex circuits. It is widely used in various electronics applications range from consumer electronics, medicals, aerospace and wearables. For those wide usage, may some designers or engineers had ever faced such a common difficult that traces be cut or broken accidentally when using or assembling. Herein, we summarized general steps to repair cut traces on a rigid flex circuit board.