Two-hundred rating points in two months? LOL!
I am 1300 rated here on chess.com,how i improve to 1500 within 2 months, plz help

It needs time to improve. When you stagnate, just go on playing, analysing and learning, and don't care much about the rating. With regular training it is impossible not to improve in the long run.
I stagnated for a very long time at 1550, but in the last months I am going up regularly with my rating, now I am close to 1700 in Daily Chess. Mostly because my tactical skills are better (but still very weak compared to the 2000 players in Daily), but also because I tend to come out from the openings with a better position, as I am playing main lines instead of bizarre things and I have at least an idea what to do in the middle game (especially with white).
In your games, u r simply blundering. Play longer games and fix this issue first