Abstract: Changes of POre pressure parameter B of the compacted clay sample before and after consolidation and itseffect on strength properties are dealt with in this paper. Test results show that the test sample with B = 1 beforeconsolidation will give B< 1 after consolidation, so its shear strength increases nonlinearly with the consolidationstress. And the relationship between B and Sr varies with the testing condition. Besides, the dripping effect oftriaxial apparatus base and sample cap on test results and the factors which affect consolidation drainage measurementand B-paramater are also analysed in this paper.