What were Hitler 's plans with russia if germany won the war?
From the Nazis’ point of view, the war against Russia is a "racial war" against Jewish and Slavic “races” to build Europe as a "racial entity". They planned to destroy Russia permanently, colonize western parts of the Soviet Union, and expel the inhabitants beyond the Ural mountains or exterminate them. 
Hitler planned to divide the new eastern territories into four Reichskommissariats to destroy the Soviet Union as a geographical entity, including:

- Reichskommissariat Kaukasus (RKK): southern Russia and the Caucasus area, except the western part of Georgia and the whole Armenia.
- Reichskommissariat Moskowien (RKM): most of European Russia between the Ural mountains and its boundaries with Finland.
- Reichskommissariat Ukraine (RKU): formerly Soviet Ukraine and Rostov, except the District of Galicia, Odesa, Vinnytsia, and the Crimea.
- Reichskommissariat Ostland (RKO): formerly Soviet-annexed Estonia, Latvia, Lithuania, except Memel, and Soviet Belarus.

The leaders of these provinces, the Reichskommissars, would be direct subordinates of Hitler, and answerable only to him. During Operation Typhoon in 1941, Hitler especially planned to level Moscow, killing its 4 million inhabitants and permanently submerging it under an artificial lake to destroy it as a potential center of Bolshevist resistance.