The present invention provides a liquid crystal display panel and a manufacturing method thereof, and a manufacturing system. The method comprises filling a mixture of liquid crystals, a first polymeric group, a second polymeric group, and a dichroic pigment in a first substrate and a second substrate which are arranged into a cell; and controlling the first polymeric group and one portion of the dichroic pigment to be polymerized to form a first alignment layer and a first polarizing layer, and the second polymeric group and another portion of the dichroic pigment to be polymerized to form a second alignment layer and a second polarizing layer. The present invention omits a coating process.