The invention discloses a transverse integral component for an assembled integrated wall-tile system and an assembling method thereof, and relates to the field of wall-tile processing, assembled devices and assembling installing technologies. By means of the transverse integral component for the assembled integrated wall-tile system and the assembling method thereof, the problems that in an existing wall-tile wet combining method, the work environment is poor, the construction period is long, the labor cost is high, and workers are subject to pneumoconiosis are solved; the problems that in anexisting wall-tile dry hanging method, installing is tedious, the labor cost and the material cost are high, occupied space of wall-tile back fitting keels is large, and the using rate of indoor spaceis reduced are solved. According to the transverse integral component for the assembled integrated wall-tile system and the assembling method thereof, vertical components are fixedly connected with wall corners, a clamping piece I is clamped on every pair of longitudinal scale punched holes of a vertical component, multiple transverse components I are arranged between the two adjacent vertical components, elastic protection films are arranged on the backs of wall tiles, each wall tile is installed between the two adjacent transverse components I, and clamping grooves in the upper end face andthe lower end face of each wall tile are matched with a first hook and a second hook of the corresponding transverse component I respectively. The transverse integral component for the assembled integrated wall-tile system and the assembling method thereof are used for assembling of an assembled integrated wall-tile system.