The invention provides a two-sided liquid crystal display panel and a liquid crystal displayer. The two-sided liquid crystal display panel comprises a light bar, a heat dissipation block, a light guide plate, a U-shaped frame, a glass substrate and a circuit board; the light bar is used for serving as a light source; the heat dissipation block comprises a heat dissipation head part and a heat dissipation tail part and is used for dissipating heat produced by the light bar; the light guide plate is arranged opposite to the light bar and used for transmitting light rays emitted by the light bar; the U-shaped frame is used for fixing the whole light bar and one end of the light guide plate on the inner side of the U-shaped frame; the glass substrate is used for serving as a display screen; the circuit board is used for installing a drive circuit; the thickness of the heat dissipation head part is smaller than that of the heat dissipation tail part, the glass substrate is connected with the circuit board through a connecting structure, and the surface of the circuit board and the surface of the glass substrate are located in the same horizontal plane. By means of the two-sided liquid crystal display panel and the liquid crystal displayer, the problems that the light bar of the two-sided liquid crystal display panel is not prone to heat dissipation and is too large in thickness are solved.