The invention relates to a C-Si-N silicon steel hearth roller sleeve and a manufacture method thereof. The manufacture method comprises the following steps of: mixing 15-35 weight percent of carbon raw material granule, 20-40 weight percent of crude carbon raw material powder being smaller than or equal to 180 meshes, 40-55 weight percent of fine carbon raw material powder being smaller than or equal to 300 meshes and 1-15 weight percent of fine Si powder, additionally adding a bonding agent accounting for 5-18 weight percent of the mixture and mixing as well as grinding for 15-30 minutes; pressing and molding into a silicon steel hearth roller sleeve blank after mixing and grinding, loading the sleeve blank into a sintering furnace with an N2 atmosphere, preserving heat for 4-8 hours at 1,450-1,700 DEG C and sintering; maintaining the nitridized and sintered sleeve blank for 15-30 minutes under the condition of 10,000-20,000Pa, injecting tar and continuing to maintain for 15-30 minutes under the condition of 10,000-20,000Pa; preserving heat for 4-8 hours at 1,400-1,450 DEG C in a reducing atmosphere; and processing through a lathe and a grinder until the surface roughness is not larger than 12.5. The sleeve has the characteristics of good abrasive resistance, good oxidation resistance, high strength, low porosity, no nodules and long service life.