The invention discloses a production process of 
polyester FDY multi-roll oil-free full-draft fibers. The production process includes the following steps that 
polymerization is conducted in a final 
polymerization autoclave, raw materials are then processed by means of a melt conveying pump, a melt 
distributor and a melt 
booster pump in sequence, the obtained melt is conveyed and then processed by means of a melt cooler, a 
static mixer, a melt distribution valve and a 
spinning box in sequence, then the melt is extruded in a 
metering pump and processed by means of a 
spinning assembly, 
fiber cooling and molding is conducted, then semi-finished fibers are processed by means of a U-shaped 
ceramic piece, a secondary network, a 
spinning channel, a first additional U-shaped 
ceramic piece1, a second U-shaped 
ceramic piece 2, a first silk guide roller, a first-level hot pulling roller, a second-level hot pulling roller, a third-level hot pulling roller and a heat-setting hot roller in sequence, a lubricating nipple is used for oiling, and the obtained fibers are processed by means of a second silk guide roller, a primary network, a third silk guide roller and a guide wheel and subjected to coiling, doffing, quality testing and packaging. According to the production process of the 
polyester FDY multi-roll oil-free full-draft fibers, the product quality is improved, the running environment of equipment and the 
working environment of workers in a FDY production place are optimized, 
yarn path operation is simplified, and 
energy conservation and high efficiency are achieved.