The invention provides an embedded composite spinning device with a structure composed of a tension device, a filament device, a spindle fixing device, a roving device, a harmonious spinning unit and a composite spindle, wherein the filament device comprises a filament spindle, a silk guide rod and the tension device, which are arranged on the upper portion of the spindle fixing support, the roving device comprises a roving spindle, a suspended spindle hanger and a silk guide rod, the roving spindle is hanged under the spindle fixing support through the suspended spindle hanger, a filament passes through the silk guide rod and then the tension of the filament is partially increased through the tension device, finally the filament passes through a silk guide to reach a front leather rollerand is harmoniously spinned with a roving in the roving device to form a novel spun yarn. The overall structure of the device is simple, the operation and use are convenient, the stability is excellent and the reliability is high. Different numbers of silk yarns and fibers can be freely combined, and the passages for the yarns are clear and smooth, thereby being favorable to observing the yarn technology passages for controlling yarn quality timely, moreover, the arranging sequences of the yarns can be freely combined in different wrap angles to form novel yarns with various effects.