A liquid crystal display panel and a liquid crystal display device are provided. The liquid crystal display panel includes a polarizer, a first substrate, a liquid crystal layer, a second substrate and a quantum-dot polarizer, the polarizer comprising a first protective layer and a first polarizing layer, the quantum-dot polarizer comprising a second protective layer and a second polarizer, an absolute value of a difference between a thickness of the first protective layer and a thickness of the second protective layer is within a preset threshold range. According to the above method, the present disclosure can reduce the difference in thickness between the polarizer and the quantum-dot polarizer, so that the liquid crystal panel does not easily warp.