Abstract: Effects of Solid solution and aging treatment on the microstructure and properties of elastic C17510 alloy is studied by OM, SEM, XRD and TEM. The results show that the proper solid solution treatment temperature of cold-rolled C17510 alloy is 950 ℃. The hardness of specimen exhibits a single peak after aging for 4h and then continuously decreased as a result of over-aging afterwards. With the prolonged aging time, the electrical conductivity increases firstly, and then keeps stable. After the cold-rolled C17510 alloy is solution treated at 950 ℃ for 0.5 h and aged at 525 ℃ for 4 h, the Vickers hardness and electrical conductivity are 231 and 56%IACS respectively.