The invention provides a mounting method of an embedded miniature stress sensor for a solid rocket engine. The mounting method comprises the following steps: mounting the miniature stress sensor on a heat insulating layer at the inner part of the engine, so that the outer casing and a propellant grain of the engine are not damaged, and influence on the structural integrity of the engine is reduced to the lowest level; and besides, segregating the embedded miniature stress sensor from the propellant grain of the engine through spraying a lining layer, and the situation that the electrical property of the sensor is unstable because of the chemical corrosion of a propellant in a long-term storing process is avoided.