A touch display panel and a liquid crystal display device are disclosed. The touch display panel comprises: a substrate (1); a Chip-On-Film (COF) (2), one end of the COF (2) being bound on the substrate and the other end of the COF (2) having a first binding pin (21); and a flexible circuit board (3), one end of the flexible circuit board (3) being bound on the substrate (1) and the other end of the flexible circuit board (3) having a second binding pin (31), wherein a width L2 of the second binding pin (31) is greater than a width L1 of the first binding pin (21).