The　continuous-energy　resonance　self-shielding　calculation　method　based　on　the　wavelets　scaling　function　expansion　method　is　a　valuable　potential　method　to　solve　the　complex　resonance　problem.　Daubechies＇　wavelets　scaling　function　expansion　method　is　used　to　discretize　the　energy　variable　of　neutron　flux　within　the　resonant　energy　range.　In　this　method,　the　neutron　transport　equation　is　transformed　to　a　set　of　coefficients　equations　of　wavelets　scaling　function　expansion.　Calculation　of　the　coefficients　is　so　time-consuming　that　a　powerful　neutron　transport　calculation　method　is　needed　for　better　calculation　efficiency.　In　this　paper,　the　discrete　direction　probability　method　(DDPM)　is　employed　as　a　tool　for　solving　the　wavelet　scaling　function　expansion　coefficients.　The　numerical　results　indicate　that　it　is　capable　of　computing　the　coefficients　with　high　computational　efficiency　and　precision.