The flexible absorbing material is very important in nowadays stealth technology. In the production of flexible absorbing fabric, the successful yarns spinning is a key factor in flexible fabric’s development. In this paper, the main spinning process of blended yarn with Ni-Fe fiber and flame-retardant polyester fiber had been discussed. Multi-mixture of Ni-Fe sliver and fiber and polyester sliver was used to spinning the blended yarn. Finally, four different ratios of 59tex fineness blended yarns were successfully developed.