In this paper，a microporous ceramic emitter was used as the research object to carry out in-situ soil tank infiltration simulation test to study the influence of initial moisture content of soil on infiltration characteristics of porous ceramics，which provided reference for determining the field application parameters of porous ceramic infiltration irrigation． An empirical model was established to simulate the relationship between the cumulative infiltration volume and the wet front migration distance and the initial moisture content and infiltration time． The results showed that the initial moisture content of the soil under the no-pressure condition had a great influence on the cumulative infiltration，and as the infiltration time increased，the rate of change of the cumulative infiltration decreased gradually． At the same infiltration time，the greater the initial soil moisture content，the smaller the cumulative infiltration，and this phenomenon is more and more obvious with the increase of infiltration time． Under different initial moisture content conditions，the migration distance of the wet peak in each direction is a power function of time．