This paper presents solar thermal desalination of seawater by constructing a solar trough collector, condensation chamber, and charcoal filter for desalination of seawater, and filtration of obtained water samples with a simple low-cost technique. Solar trough collector consists of an aluminium sheet polished on one side with a solar reflective film which is fixed in a parabolic shape using a wooden frame and then the trough is fixed on a frame made of PVC pipes. A copper pipe coated with black paint on the outer surface of the copper pipe and is fixed at the focal point of the parabolic collector, the copper pipe is enclosed using a glass plate which is fixed to the parabolic collector, and a plastic water jar is used as saline water storage tank which is coated with black paint on outer surface. In this paper design and analysis of solar-powered water desalination tank using parabolic trough collector is experimented. The saline water uses solar energy after passing through desalination tank have Total Dissolved Solid, electrical conductivity and Alkanity of the water reduced a lot and becomes normal drinking water.