The invention provides a method for layer judgment and layer number storage and recording of a mining blasting unit body. The method specifically comprises the following steps of carrying out ore body modeling, and building layers of independent ore body surface entities; obtaining the number of seams, cutting a stoping drift section required for modeling of the blasting unit body and obtaining the number of the seam at which the current layer is located; and writing attribute description values, namely generating a blasting unit entity, writing the number of the seam into attribute description fields of the blasting unit entity and a contour line. The method provided by the invention can obtain the ore source condition of the upper part of the current blasting unit body under the condition of not needing an ore body plane graph and various layered ore body profiles of the position at which the blasting unit body is located, so that the work efficiency and the accuracy for obtaining information are greatly improved; fine management on resources in mining production is achieved by data; and a detailed data basis is provided for fine management in the mining production process.