after finishing B.E in civil engineering should we have to do a P.G(like M.E) TO GET A GOOD JOB.....

Yes, you must go for Masters program, it will really help you to get good job.

No, it is not essential that you have to do M.E or any other post graduation course to get a good job. But higher education always brightens up the chances and makes your horizon wider. In short you are able to apply to more number of vaccancies. As such B.E in Civil engineering should give you a go