The invention discloses an optical cable and electric cable laying method applicable to an intelligent substation, and aims to solve the problems of inflexible structure and poor maintainability when an electric cable is laid traditionally. The technical scheme comprises the key points of: (a), ditching a ground; (b), laying outer groove boxes; (c), laying a support bridge frame; (d), laying inner groove boxes; (e), respectively laying a power cable, a control cable and an optical cable in three sets of inner groove boxes; (f), laying an inner groove box at a branch; and (g), closing the groove boxes. The optical cable and electric cable laying method applicable to the intelligent substation disclosed by the invention is relatively flexible in installation structure and high in maintainability.