Abstract: Strain-aging sensibility tests were carried out for 10MnNiCr steel plates.The results show that the hot rolled thin plates and quenched and tempered heavy plates have lower strain-aging sensibility,and normalized and high tempered mid-plates have higher strain-aging sensibility.Improvement of microstructure and increment of toughness can reduce the strain-aging sensi-tivity of 10MnNiCr steel.