Seismic intensity attenuation for oft-com:office:smarttags" />North China is fitted by using 89 isoseismal lines from 37 earthquakes in this region. The earthquakes are mainly selected by M(M≥5.0). Compared with the past model, the accuracy is improved by using the data of moderately strong earthquakes. The model shows that North China has low seismic intensity attenuation.oft-com:office:office" />