Kya pehli biwi Rehe he ki dsri sadhi kar ska hai pehli biwi k sahamai lekerr kya 2nd biwi 1s biwi ki

No.
As per Hindu Personal laws a second marriage without ending the first marriage would be null and void.

If a Hindu Man or Woman wishes to remarry while their existing spouse is alive the only way to go about doing the same is to get a valid divorce.

It is preferable in fact to get down to a negotiating table and negotiate the terms of any potential maintenance, alimony, custody of any children if any, jointly owned property or jointly held accounts.

The couple can then approach the Family Court jointly and file a petition for mutual divorce together which is much faster and more convenient than filing a petition on any contested grounds like the marriage has broken down beyond repair.