【正】 A novel way to extract the reaction plane dispersion by combining azimuthal distribu-tion constructed using the experimental measured reaction plane which contains reaction planedispersion and two-particle azimuthal correlation which is free of reaction plane dispersion is de-scribed.This method is applied to the low energy fission reaction <sup>84</sup>Kr+<sup>27</sup>Al at 10.6 MeV/u forlight particles p and a with success.