HOW CAN I GET A NEW PAN CARD WITH HAVING OLD PAN NO. WHICH I LOST

if you know your pan number, apply to uti for a duplicate pan card. if you don't know pan number, apply before your jurisdictional AO with your name father's name and date of birth, to know about your pan number and after getting details about your pan number apply before the uti

Apply through NSDL which is more efficient compare to UTIISL. If you know your Pan card number, you can apply online, also you could make the payment online and then send the documents by post to mentioned address. If you're registered with income tax department website, you can get to know the pan details in case you don't remember the pan number.