The method of hydrogen reduction for preparing metal chromium was proposed.The thermodynamic process of hydrogen reduction Cr

2

O

3

or K

2

Cr

2

O

7

was described

and influences of dynamic factors were analyzed

such as additives

hydrogen flow rate

reaction time and temperature on hydrogen reduction of Cr

2

O

3

and K

2

Cr

2

O

7

.The result of reaction system was analyzed by XRD and weight loss rate.The results reveal that Cr

2

O

3

and K

2

Cr

2

O

7

can be restored by H

2

in the system with the water pressure and hydrogen partial pressure ratio less than 10-5 at 1 200 ℃for 3h through controlling the hydrogen flow rate at 1L/min and adding 1%Cr

and reduction effect of K

2

Cr

2

O

7

exhibits desirable.