The invention discloses an installation construction technology of an open mounted lightning receiving strip supported by a casing pipe. The installation construction technology comprises the following steps that A, a casing pipe support is manufactured; B, the casing pipe support is positioned; C, the casing pipe support is installed; and D, the lightning receiving strip is installed. According to the scheme of the installation construction technology, compared with the prior art, a supporting column, the casing pipe and an antirust layer are only needed, then manufacturing and forming are achieved, manufacturing is easy, construction is convenient, and good practicability is achieved; the lightning receiving strip is supported and fixed by penetrating through the casing pipe, welding construction between the lightning receiving strip and the supporting column is omitted, meanwhile the processes of antiseptic treatment, finishing coat treatment and the like of a supported point of thelightning receiving strip are further omitted, the construction cost is reduced, the construction work efficiency is improved, and the economic benefits are obviously improved; the later maintenanceworkload is reduced through arrangement of the antirust layer, and the service life of the lightning receiving strip is prolonged; and when being installed, the lightning receiving strip can extend and retract left and right in the casing pipe, the problem of welding prestress caused by welding of the lightning receiving strip and the supporting column is solved, the straightness of the lightningreceiving strip is ensured, and the appearance quality of the lightning receiving strip is improved.