The invention discloses a liquid crystal displayer and a disassembly method of a liquid crystal display panel thereof. The liquid crystal displayer comprises a plastic frame, an optical diaphragm, the liquid crystal display panel and a double-sized adhesive tape. The plastic frame comprises two inner walls and two bearing faces. The two inner walls enclose a first accommodating space and a secondaccommodating space, which are different in size and are communicated. The first bearing face is jointed with one of the two inner walls. The other bearing face is jointed with the other inner wall and expend outwards. One side of the double-sided adhesive tape is adhered with the optical diaphragm, the other inner wall and the two bearing faces, and the other side of the double-sided adhesive tape is adhered with the liquid crystal display panel. The optical diaphragm and the liquid crystal display panel are both arranged in the plastic frame. A protruding part is extended from the double-sided adhesive tape to the second bearing face of the plastic frame. In the disassembly process of the liquid crystal panel, the linkage of a backlight module with the liquid crystal panel is avoided.