Abstract: Using the chrome ores from India and Tibet, middle/high-grade magnesia and fused magnesia as raw materials, the φ50 mm × 40 mm cylindrical specimens were compacted under 200 MPa and sintered at 1700-1750°C. The aspect ratio of specimens was measured before and after sintering to obtain their volume changes by which the effects of different raw materials used and their mixture proportions of grain sizes on the volume change of direct-bonded magnesia-chrome refractory bricks were discussed. Some measures were therefore proposed to control the volume change of those bricks, i.e., changing the amount of the chrome ore from India to be added in fine grain and adjusting the mixture proportion of middle-grade magnesia to high-grade one in fine powder. The experimental results showed that when the mass ratio of chrome ore from India to that from Tibet is high and the mass ratio of middle-grade magnesia to high-grade one is low, the volume change is relatively small and vice versa.