The invention provides a body-mounted parabolic antenna for a gas-filled satellite. The parabolic antenna comprises an antenna reflection surface with a parabolic structure, a support ring, a support pipe, a guy cable, a feed source and a feed source support; the antenna reflection surface with the parabolic structure is fixed in the support ring; the lower end of the support pipe is connected with the support ring; the guy cable is connected between the support pipe and the antenna reflection surface with the parabolic structure; the feed source is arranged at the lower side of the antenna reflection surface with the parabolic structure; and the feed source support is connected between the feed source and the support ring. The body-mounted antenna provided by the invention is adopted, compared with the traditional antenna, as a mounting mode of satellite external accessories, the body-mounted antenna is beneficial to the increase of the effective aperture of the antenna, the larger the aperture of the antenna is, the more gain, the further detection distance and the better target discrimination can be obtained; and the body-mounted antenna is good for improving the general dynamic property of the satellite, is convenient for the operations of gesture regulation, orbital transfer and the like for the satellite in the space operation process, and is good for improving the general structure rigidity and vibration fundamental frequency of the satellite.