Abstract: Based on the property of coal body mechanics, a new type of coal mining roadheader is practically applied, and a new mining method of inner cutting-outer stripping is established.The working mechanism of the internal-cutting external-stripping method method is illustrated by establishing a mechanical model and using a column model and a beam model.The mechanical model shows that the tensile stress causes greater deflection than the compressive stress, and the deflection has a quadratic relationship with the mining width.In order to understand the law of mine pressure manifestation in Tongmei Datang Tashan Coal Mine and improve the mining efficiency, the stability of 8203 working face in the second panel area was analyzed using UDEC numerical simulation method.The numerical results show that the 0.8 m width of inner cutting and the 0.4 m width of outer stripping are optimal parameters for 8203 working face.The field test results show that the recovery rate of the inner cutting and outer stripping method is above 90%,which is 20% higher than that of traditional method.