Radial distribution function (RDF) of water in different conditions was studied by MD simulation with SPC/E water model. The results of RDFs between water oxygens and oxygens ( gOO( r) ) ) indicate that the nearest distance of water molecule is 0.25 nm. The first and second peaks of ( gOO( r) ) are in 0.28 nm and 0.45 nm which are the positions of first and second "water hull" respectively. The results of RDFs between water oxygens and hydrogens( gOO( r) )  indicated that the main distances of hydrogen bonds of water molecules are 0.18 nm. RDFs between water hydrogens and hydrogens( gOO( r) ) depended on the changes of hydrogen bonds of water molecules and( gOO( r) ) .