The paper introduces the blasting types, characteristics and fracturing mechanism in seasonal frozen soil. By the study on blastin technology of spherical charge beneath frozen ground in Baoxinggou mining area of Heilongjiang, the construction difficulties in exploration ditch of frozen ground are successfully solved. The practice shows that blasting flyrock can be effectively controlled by rational blasting parameters and economic and technical indexes selected on basis of the actual situation of the local climate and soil to lower the construction cost and improve the construction efficiency. The paper presents the technical parameters and parameter indexes which can be reference to the similar exploration ditch blasting construction.