A liquid crystal display panel and a liquid crystal display device are provided. The liquid crystal display panel includes: a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate, in which a heating electrode is arranged on a side of the first substrate facing towards the liquid crystal layer. Heat generated by the heating electrode can directly act on liquid crystal molecules in the liquid crystal layer, so that the liquid crystal display panel can be quickly started and a response of the liquid crystal molecules in the liquid crystal layer can be accelerated in a low temperature environment, thereby guaranteeing the display quality of the liquid crystal display device in the low temperature environment.