The work aims to study the distribution law of raw nitrogen in wooden packing material. Fast pyrolysis experiments were conducted on a fixed bed reactor to study distribution law of pyrolysis products and gaseous product components in adhesive, solid wood and particle board at different temperatures. Distribution law of nitrogen among products in all phases and all gaseous product components was studied by using integral pyrolysis-gas chromatography-mass spectrometry system. Nitrogen content and pyrolysis temperature were the main factors influencing nitrogen distribution among products in all phases. As the temperature increased, pyrolysis gaseous nitrogen yield increased while carbon nitrogen and tar-N decreased. During the process of pyrolysis, micromolecules and heterocyclic nitrogen structure were produced by nitorgen in particle board through self-pyrolysis and cross reaction among wood components. Heterocyclic nitrogen structure continued producing micromolecules by pyrolysis and multi-nitrogen heterocycle structure by aggregation at high temperature. In conclusion, temperature and resin consumption are the two main factors influencing composition distribution of nitrogen compounds. Nitrogen in waste particle board comes from urea formaldehyde resin and wood. And there are two transformation paths in pyrolysis and polymerization reaction of raw nitrogen. One is to produce NH3 and Char-N by pyrolysis, and the other to produce volatile heterocyclic nitrogen.