The invention discloses a combined structure of a suspension insulator string and a strain clamp and a construction method thereof. The combined structure of the suspension insulator string and the strain clamp is installed on a cross arm head of a linear tower, two suspension composite insulators are hung on the cross arm head of the linear tower, and the suspension composite insulators are connected with a first connecting plate by a hanging plate of a bowl head; the first connecting plate is connected with a second connecting plate by a first Z-shaped hanging plate; moreover, the first connecting plate and the second connecting plate are arranged in a mutually vertical way; the second connecting plate is also connected with a third connecting plate by a second Z-shaped hanging plate; and both sides of the third connecting plate are respectively connected with a wedge-shaped wire clamp, and conducting wires are installed in the wedge-shaped wire clamps. The combined structure of the suspension insulator string and the strain clamp and the construction method thereof disclosed by the invention are adopted on the linear tower, the stress of the conducting wires is favorably improved, and the vibratory injury of the conducting wires is greatly relieved, so that the running service life of the conducting wires of a power transmission line is prolonged.