I have a double din cd player?

I have a 2000 Honda civic 5 door hatchback mb6 I want to know how to fit a double din cd player into it

Dependind on the size of the receiver, go to sonicelectronics.com. It will tell you what your vehicle is compatible with

That car only has a single-DIN slot in the centre console.
You would need a custom-made (i.e. Very expensive) replacement console that relocates the HVAC controls to fit in a double-DIN head unit.
There's an example at http://civic5.com/forum/index.php/topic/8007-dashboard-swap-2din-console-radio-relocation/