In wbjee my rank is 56000 i,I can't any government college?

At this rank, it is hard to get any government colleges in West Bengal. There are a few government colleges in West Bengal and all the government seats get filled within 3000 rank. As you have secured 56000 rank, then you can get - Budge budge institute of technology, Camellia institute of technology, BIET Siuri, Modern institute of technology, Academy of Technology, Bakura Unnayani Institute of engineering, BCET Durgapur etc.