The utility model provides a life jacket with a lengthened radio antenna, which can increase the communication distance of a lifesaving radio on the life jacket and the range of rescue searching. The life jacket comprises a lifesaving radio pocket sewed on the life jacket, the lifesaving radio which is arranged in the lifesaving radio pocket, and the lengthened antenna; the lengthened antenna is connected with the antenna of the lifesaving radio through a lead; and an antenna jacket which is sewed on the life jacket is arranged above the lifesaving radio pocket, and the lengthened antenna is wrapped in the antenna jacket. In the utility model, the lifesaving radio antenna on the life jacket is lengthened on the premise of not affecting normal use, so that the communication distance of the lifesaving radio on the life jacket and the range of rescue searching are increased, and accurate and timely distress signals in adverse environment are ensured.