The invention relates to the technical field of display and discloses a splicing type display screen and an assembling method thereof. The splicing type display screen comprises at least two liquid crystal display units which are spliced together and a transparent cover located on the light outlet sides of the liquid crystal display units. No front frame is arranged on the liquid crystal display units. Each liquid crystal display unit and the transparent cover are stuck together. A shading bar is arranged at the position, corresponding to the position where the liquid crystal display units are spliced, of the transparent cover. Due to the fact that no front frame is arranged on the splicing type display screen, space for side folding of a front frame is omitted in the splicing gaps between every two adjacent liquid crystal display units; accordingly, compared with the prior art, the splicing type display screen has the advantage that the distance between the display areas of every two adjacent liquid crystal display units is reduced, and therefore the image display quality of the splicing type display screen is good.