The invention discloses a seamless core-spun calcium wire machine structure. A steel strip transition frame is arranged on one side of the front end of a machine frame, a steel belt conveying carrierroller is arranged on the machine frame, a steel belt inlet is formed in the front end of the machine frame, and horizontal pressing rollers are arranged in pairs at intervals; moreover, shaft holes are formed in the centers of the horizontal pressing rollers, and the horizontal pressing rollers are assembled and installed on bases through shafts, so that the horizontal pressing rollers are fixedto the machine frame; four groups of clamping and folding rollers are installed in an up-and-down correspondence mode, and the clamping and folding rollers and the horizontal pressing rollers are arranged at intervals; the clamping and folding rollers are arranged on backrests in pairs and in an up-down mode, shaft holes are formed in the centers of the clamping and folding rollers, the clamping and folding rollers are connected with universal joints I behind the backrests, the outer circle surfaces of the four groups of clamping and folding rollers are gradually bent and deformed in the steelbelt feeding direction, and a calcium wire feeding pipe is obliquely installed between the rear surfaces of the clamping and folding rollers and the middle of compaction pressing rollers; and shapingpressing rollers are sequentially installed behind the compaction pressing rollers, shaft holes are formed in the centers of the shaping pressing rollers and the shaping pressing rollers are assembled and fixed on the backrests through shafts. According to the technical scheme, the production process is continuously operated and is completed in one station, and the product production speed is high.