now i'm doing b.tech 2nd year.i want 2 do M.B.A after the engineering.but i got only 58% in 12th so tell me can i get admission in IIM

It is unlikely. as normally the minimum cut off percentage required by them is 60%. Question is, why ONLY IIMs? there are couple of other institutes as well, where you can try.

Yes Amit, you can very well get into IIMs. Just make sure you secore a high percentile in CAT and give the best shot at subsequent stages which includes essay writing, GD and PI. I know of one of my batchmates in IIM Calcutta who had 56% in 12th.