Abstract: A package structure for the multi-channel parallel transmission optical device includes a package base, a package cap which is used to form a package shell with the package base, and a plurality of laser generating units that are all mounted on the package base and arranged annularly relative to the axis of the package base. Each laser generating unit is equipped with an optical mirror group to convert the laser emitted by the laser generating unit into the laser beam parallel to the axis of the package base. A converging lens is also configured inside or outside the package shell, or the package cap uses the converging lens as an optical window, and to converge each laser beam into output beam. The optical path design can significantly reduce the device package volume, which correspondingly increases the channel density.