In the near future,are large asteroid's going to hit the earth?

Very unlikely. There were many large asteroids early in the history of the solar system, but most of those have long since collided with the planets or become moons, so that are very few large asteroids left, and all of those are in stable orbits which come nowhere near the Earth. The main remaining danger is from quite small asteroids, some of which p quite close to the Earth, but very rarely collide with Earth. The last largish one was a century ago.