Atmospheric refraction is one of the important factors affecting the optical measurement of the target's external trajectory parameters. Atmospheric refraction correction is necessary under the condition of higher measurement accuracy for optical equipment. aiming at the problem that the theoretical derivation process of standard method is not precise enough and repeated iterations are needed in the calculation process, based on atmospheric sphere sublayer and optical equipment features, an atmospheric refraction correction method based on angular intersection is proposed. Simulations and unmanned aerial vehicle flight test show that proposed method is faster and more accurate than the standard method.