Abstract: We apply rock mechanics testing machine and AMSY-6 acoustic emission collection system to carry out acoustic emission test of coal samples with strong impact tendency under uniaxial compress condition. The dynamic evolution laws of acoustic emission energy counting, ring counting and positioning events in the process of deformation and failure are studied. The experimental results show that statistical parametric curve of acoustic emission of coal sample with strong impact tendency can characterize the failure process of coal and rock mass. The acoustic emission curve can be divided into four stages, which are basically corresponding to the compaction, elasticity, shaping and failure stages of the stress and strain curve. The precursory features that can characterize coal and rock failure damage including energy counting and ringing count before the destruction of a substantial increase in energy count, ringing count and positioning events before the destruction of the acoustic emission before the damage period, the unit stress increment within a substantial increase of the acoustic emission in the incident. The change of sample size has great influence on the earlier stage of statistical parametric curve of the acoustic emission, which has no obvious effect on the precursory characteristics of the failure and the size effect is not obvious.