Waste pyrolysis and gasification refers to the process of breaking the macromolecules of organic components in garbage to produce small molecule gases, tar and residues under the condition of no oxygen or oxygen deficiency. Garbage pyrolysis gasification technology not only realizes the harmlessness, reduction and recycling of garbage, but also effectively overcomes the problem of dioxin pollution caused by garbage incineration, so it has become a garbage treatment technology with great development prospects.