This paper introduced the method of grey degree of association evaluation to evaluate the risk of ground fissures and explained the evaluation methods and models systematically. Taking Tongzhou, one district of Beijing as an example, the authors illustrated the status of ground fissures in the district, and used the genetic analysis, selected six evaluation indicators from three factors and then calculated the weights of evaluation indicators to assess the risk level of the ground fissures, and mapped the zoning map. As the results, it was divided into moderate-prone areas, mild-prone areas, little-prone areas and non-prone areas.