To investigate the moisture characteristics of soil cultivated indoors by bio-organic fertilizer,effects of different fertilizer were analyzed under varied bulk density conditions.Parameters of moisture,moisture constants,and moisture availability of soil were evaluated by using VG model.The results showed that the VG model can well fit with the moisture characteristic curve of soil.Under the same bulk density with different processing conditions,applying EM organic fertilizer influenced soil moisture mostly,following by applying a soil modifier,the least is the case without any agent.As the increase of diluted concentrations of EM dope,soil moisture increased.Under different bulk density with the same processing conditions,soil moisture-keeping nature and the availability of soil moisture reduced gradually as the increase of bulk density.