Nowadays，animal husbandry in China developsrapidly.In order to achieve the waste pig bedding compostreuse，this experiment was conducted to investigate the possibility of mixing different ratio coal slag with the waste pigbedding compost as the culture media for tomato seedling.To meet the demands of tomato culture，the characteristicsof culture media，for example，pH，conductivity，soil bulk density and porosity were measured.The results showedthat compost treatments meet the standards for being harmless which had no toxic effects on crops.The characteristics oftomato seedling such as height，stem diameter，raw weight and dry weight from overground part of treatment A5 were thelargest，which were 23.1cm，0.44cm，16.38g，and 1.64g，respectively.This showed that the compoundsubstrate(pigbedding:mushroom residue=3∶1)and without adding coal slag(A5)was suitable for crop seeding.The bulkdensity， total porosity and water-gas ratio of this compound substrate were 0.63 g·cm-3，78.5%，and4.06.Usingcoalslag，waste pig bedding compost and mushroom dreg-based compost as culture media is environmental friendly and an effective way toturn waste intowealth，without secondary pollution toenvironment.