Nanocomposite Nd9Fe85-xB6Inx magnets were synthesized by melt-spinning method. The effect between indium-dope and treating process on their magnetic properties were investigated by using XRD and VSM. The results show that both the coercivity and remanence ratio can be enhanced by a small indium-dope in Nd9Fe85B6 nanocomposite, while squareness of its hysteresis loop is also improved greatly. The optimum energy product increases remarkably from 95 kJ/m3 to 145 kJ/m3, while coercivity rises from 405 kA/m to 465 kA/m at 0~0.5 mol% indium-dope.