Warm -keeping trousers

The utility model belongs to the technical field of the warm -keeping trousers technique and specifically relates to a warm -keeping trousers, including the waist of trousers, the waist of trousers ishollow structure, waist of trousers inner chamber is equipped with first elastic cord, waist of trousers bottom surface both ends all are equipped with first trouser legs, two long wide sizes of first trouser legs equal and mutual parallel arrangement, two first trouser legs bottom surfaces all are equipped with first zip fastener, cold -proof mechanism is connected to first zip fastener bottom surface, cold -proof mechanism bottom surface is equipped with the second zip fastener, second zip fastener bottom surface is equipped with the second trouser legs, second trouser legs and first trouser legs length equal, second trouser legs bottom surface is equipped with the bottom of a trouser leg, the bottom of a trouser leg is hollow structure, and bottom of a trouser leg inner chamber is equipped with the second elas