【Objective】The study aimed to investigate the differences in the degree of soil humification in the presence of foliar litter from different plant species in coniferous and broad-leaved forests in the special habitat of Wudalianchi volcanic kipuka, analyze the influence of soil humification in the home-field advantage during the decomposition of foliar litter, and provide a theoretical basis for exploring the process of soil formation and nutrient accumulation in different habitats in the volcanic forest of Wudalianchi. 【Method】Three decomposition plots were separately established in the coniferous and broad-leaved forests of Wudalianchi volcanic kipuka in late September 2016. The fresh leaves of three dominant trees, namely, Populus davidiana, Betula platyphylla and Larix gmelinii, were collected from the coniferous and broad-leaved forests. Then 10 g of the foliar litter was transferred to separate foliar litter decomposition bags. The litter decomposition interactive transfer experiment was established by transferring three foliar litter decomposition bags in separate litter plots at the same time. Then 0-10 cm of the soil directly underneath the foliar litter decomposition bags was retrieved from the decomposition plots from 2017 to 2019, around the 15th of May and October each year. The optical performance indices of the soil humus substances were detected, and the optical characteristics of the soil humus substances under different foliar litter were analyzed. The differences in the degree of soil humification following foliar litter decomposition in the home and away fields were also analyzed. 【Result】The decomposition of foliar litter in the away field altered the soil optical density (E₄/E₆), hue coefficient (ΔlogK), and relative chromaticity (RF) values of the humus substances during the 3-year decomposition period. The E₄/E₆ and ΔlogK values of the soil humification substances under the foliar litter of P. davidiana and B. platyphylla were higher in the home field than in the away field. However, the RF values of the soil humification substances were lower in the home field than in the away field, and the E₄/E₆, ΔlogK, and RF values under the foliar litter of L. gmelinii were lower in the home field than in the away field. The duration of decomposition and forest type had a significant effect on the E₄/E₆, ΔlogK, and RF values of the soil humification substances. Although the foliar litter species had no significant effect on the RF values, they significantly affected the values of E₄/E₆ and ΔlogK. The time-forest type, time-litter species, and time-forest type-litter species interactions were found to be significant.【Conclusion】Analysis of the decomposition of the foliar litter of broad-leaved and coniferous forests revealed that the degree of soil humification in the coniferous forest was higher than that in the broad-leaved forest. The decomposition of foliar litter in the coniferous forest exerted a “home-field advantage” on soil humification, which was not observed in the broad-leaved forest.