The invention discloses water base-carried inactive nitric acid powder and a production method thereof. The water base-carried inactive nitric acid powder comprises inactive nitric acid powder particles, wherein the outer surface of the inactive nitric acid powder particles is coated with a coating material which is insoluble in water but is soluble in organic solvents at the normal temperature. The method for preparing the water base-carried inactive nitric acid powder comprises the following steps of: 1, preparing a coating solution, i.e. dissolving an appropriate quantity of coating material which is insoluble in water but is soluble in organic solvents into an organic solvent at the normal temperature; 2, coating inactive nitric acid powder particles with the coating solution obtainedin the step 1; and 3, drying the coated inactive nitric acid powder particles to obtain the water base-carried inactive nitric acid powder. In the invention, the outer surface of the inactive nitric acid powder particles is coated with the coating material which is insoluble in water but is soluble in organic solvents at the normal temperature and can form a coating film on the surface of the inactive nitric acid powder particles, so that the inactive nitric acid powder is extruded into the stratum by taking a water base as a carrier.