Test of tensile properties and compression with single pass and continuous 4 pass at elevated temperature for forged bar of steel 00Cr25Ni7Mo4N melted by vacuum induction funace has been carried out by Gleeble thermal simulator. Results showed that at 900～1250 ℃

with increasing temperature and at 950～1100 ℃ with progresive increasing pass

the maximum deformation resistance of steel 00Cr25Ni7Mo4N gradually decreased; at 1050~1250 ℃ the deformation resistance of steel 00Cr25Ni7Mo4N was lower and the reduction of area was more than 60% with better hot plasticity; the steel had better hot workability as strain rate 10/s at≥1000℃ and as strain rate 50/s at ≥1100 ℃.