There's no purssure in my kitchen faucet.and the faucet is brand new,what can it be?

Was there good pressure after the install or was it bad from the get go? Check your aerator first by removing it to see if the pressure is better. Back to you for the results.

Ballenger (Bob) has shown you where to start... I have attached an image of an aerator Anjermar... It is located at the end of the SPOUT (may look different then mine, but it is there in some form).

Loosen this CLOCKWISE to remove and then run water without aerator in place. If water at full volume without aerator in place you will need to clean the aerator of any debris/sediment and then install it as you found it. Be sure the rubber washer does not fall down the drain... ;)

Let us know if this resolves issue...

MARK