The invention discloses a fabricated anti-seismic internal parting wall and a mounting method thereof. The fabricated anti-seismic internal parting wall comprises light battens; hollow grooves are formed in the light battens in the long edge direction of the light battens, grooves are formed in the edges of the side faces of the light battens in the long edge direction of the light battens, and the hollow grooves are parallel to the grooves; and the light battens are transversely combined and mounted into an internal parting wall board, square
steel columns I used for connecting are arranged between the internal parting wall board and a main body structure, square
steel columns II used for connecting are arranged between the adjacently-mounted light battens in the internal parting wall board, and connecting fixing plates used for fixing are arranged between the light battens and the square
steel columns I or between the light battens and the adjacent square steel columns II. Compared with the prior art, the light battens are fixed through mutual cooperation of the square steel columns, the connecting fixing plates and
shoot nails, the internal parting wall mounted by the light battens is tight and firm, the situation of wall body breaking or splice
cracking is avoided, puttying can be directly conducted without wall whitewashing, thus the construction cost of the internal parting wall is lowered, main lines of water, heating,
electricity and the like can be pre-buried in an internal parting wall body, unattractiveness and the potential safety
hazard which are caused by thefact that the main lines are laid on the outer side of the wall body are avoided, attractiveness is achieved, and no space is occupied.