Humus composition was used as the evaluation index to reveal the differences of fertilizing effect from different types of organic materials with equivalent C content on the albic soil.Taking albic soil as the research object，the indoor cultivation was adopted to reveal the dynamic changes in the C contents(CWSS，CHE，CFA，CHA，CHu)of water-soluble substance(WSS)，humic-extracted acid(HE)，fulvic acid(FA)，humic acid(HA)，humin(Hu)，humification coefficient(CHA/CFA ratio)and E4/E6 of HA alkaline extract from albic soil amended with four types of organic materials with equivalent C content that were biotechnology fulvic acid extract(BFA)， decomposed sheep manure(M)，corn stover powder(Pr)and solidified straw pellets(Ps)，respectively.The results show that:(1)With the culture，the albic soil amended with the tested organic materials，whose CWSS and CHu were consumed.The conversion of CFA to CHA was promoted，so that CHA could be accumulated and the degree of HA molecular condensation was improved .(2)Addition of BFA helped to alleviate the consumption of CWSS in albic soil，and had the greatest advantage in improving the molecular condensation degree of HA.However，BFA had no significant effect on the CHE in albic soil，and had the smallest effect in promoting the decomposition and mineralization of CHu .(3)The input of M contributed to the microbial utilization of CWSS in albic soil，and had the greatest effect to promote the formation of CHA and CHE .(4)The addition of Pr had the least promoting effect on the conversion of CFA to CHA in albic soil and the promotion of HA molecular condensation degree.(5)Ps had the greatest effect in promoting the conversion of CFA to CHA in albic soil，but ultimately reduced the CHE by 9.1%.In summary，the four organic materials all had the effect of fertilizing albic soil.Among them，the BFA tended to improve the quality of humus，and the M contributed to the increase of the quantity of humus.