Xylooligosaccharides producing solid waste (XPSW) was the main solid waste of xylooligosaccharides producing from corn cobs. To utilize that biorefinery waste, biodegradable seeding pots were prepared using XPSW as main ingredient through dry thermo compression molding method. The most economical formula of raw powders for XPSW based seeding pots was screened out as XPSW∶wheat bran∶adhesive∶release agent=68∶26∶6.3∶1 by weight. Also the molding parameters were optimized by orthogonal test, and the optimal compression temperature, compression pressure and holding time was 180℃, 180MPa and 4.5s, respectively. Under those conditions, the dry compress strength of XPSW based seeding pots was 2251N, and wet compress strength was 417N. Compare to corn cobs, higher lignin content and lower hemicellulose content of XPSW made the XPSW based seedling pots had better mechanical strength and lower water absorption. Fungal-growth test showed that the XPSW based seedling pots had good biodegradability.