The invention discloses a medical waste pyrolysis disposal method based on microwave quenching. According to the medical waste pyrolysis disposal method based on microwave quenching,a waste feeding device, a pyrolysis furnace, a microwave combustion furnace, a tail gas purifying device and a slag solid waste cleaning device are involved; residual carbon obtained after waste is pyrolyzed in the pyrolysis furnace is discharged into the microwave combustion furnace and serves as a strong microwave absorbing medium, the residual carbon is heated quickly, pyrolysis gas produced in the pyrolysis furnace is fully burned when passing through a high-temperature residual carbon layer, and consequently, toxic and harmful gas such as dioxin in the pyrolysis gas is completely eliminated, and damage of waste burning to the environment is greatly reduced. The steps are simple, operation is convenient, and practicality is high.