The invention discloses an ultrahigh building toilet wall stone installation structure which comprises a fixed part (1), first waterproof adhesive tape (2) and novel composite board stone (4), wherein the fixed part (1) is transversely fixed to a wall, an insertion piece is transversely arranged outside the fixed part (1), the first waterproof adhesive tape (2) is provided with an insertion groove and is connected with the fixed part (1) through the insertion groove and the insertion piece, first grooves are formed in the upper edge and the lower edge of the novel composite board stone (4), and the first waterproof adhesive tape (2) is embedded in the first grooves. Every two adjacent pieces of novel composite board stone (4) are connected and fixed through the first waterproof adhesive tape (2). According to the ultrahigh building toilet wall stone installation structure, time and labor cost for installation of a stone wall of a super-large toilet are reduced to a large extent, installation quality and efficiency are improved, higher and higher requirements for construction period, quality and cost control of a project are effectively met, and the optimal effect is realized.