This paper measure moisture porosity to test pieces of explosive lining. So are the test pieces curing in standard condition and curing in equal condition. The measured moisture porosity data of the three kinds of test pieces after flooding is analyzed. The results indicate that the moisture porosity of explosive lining test pieces is higher than that of curing in standard condition and curing in equal condition. And the different value of moisture porosity increase as the standing time moves on. There is no significant difference in water-loss porosity among the explosive lining test pieces and curing in standard condition ones and curing in equal condition ones.