The invention discloses medium carbon free-cutting non-quenched-and-tempered steel containing sulfur and tellurium and a production technological method thereof. The non-quenched-and-tempered steel mainly comprises 0.35%-0.50% of C, 0.10%-0.80% of Si, 0.75%-1.60% of Mn, 0-0.03% of P, 0.02%-0.08% of S, 0-0.08% of Mo, 0-0.025% of Nb, 0.02%-0.12% of V, 0.012%-0.016% of N, 0.02%-0.08% of Te, 0.001%-0.003% of Ca, and the balance Fe and inevitable impurities. The ratio of the tellurium to the sulfur is 0.25-2.5. According to the free-cutting non-quenched-and-tempered steel disclosed by the invention, occluded foreign substances in the steel can be subjected to modifying treatment by adding the tellurium, the cutting properties, fatigue resistance and the like of the non-quenched-and-tempered steel can be improved obviously, and pollution to the environment can be avoided.