Abstract: In order to deeply understand the ecological habit of Vaccinium uliginosum communities in Changbai Mountain, the growth environment was investigated. The results showed that: Vaccinium uliginosum community firstly appeared at altitude 1317 m in Changbai Mountain. Its growth environment was weed forest, and the leaf area index was about 1.7, the distribution of DBH classes were mostly under 10 cm and the biggest DBH class was from 24 cm to 26 cm, the distribution of the height class was from 2 m to 12 m and the maximum height was from 16 m to 18 m. The trees of larch forest-Vaccinium uliginosum communities were mainly larches, sometimes were white birches, the leaf area index was from 0.85 to 2.04, the number of DBH class from 10 cm to 12 cm was the most, from 14 cm to 16 cm was less than it. The distributions of the height class were most from 14 m to 16 m, from 6 m to 8 m was less. The relationship between the number of Vaccinium uliginosum and leaf area index was opposite, suitable for light environment. The growth substrate of Vaccinium uliginosum communities under the larch forests in Changbai Mountain was mainly about moss and litter. The substrate was divided into four tires, from the top towards bottom, of live moss layer, dead moss layer, peat layer and pozzolanic layer. The average thickness of dead moss layer was 6.0 cm. The distribution of root system of Vaccinium uliginosum was the most. Under larch forest-Vaccinium uliginosum communities, the average basal diameter was from (2.61±1.40) mm to (4.57±1.49) mm. The average height was from (33.36±10.16) cm to (59.50±13.54) cm. The Vaccinium uliginosum was dominant species among communities.