Provided is a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel includes a substrate and a thin film transistor formed on the substrate, wherein a source and a drain of the thin film transistor have complementary V-shaped structures, so as to form a V-shaped space region between the source and the drain, such that when the thin film transistor is in operation, a V-shaped conductive channel is formed in a semiconductor layer of the thin film transistor. An activation current of the thin film transistor can be increased.