Based on the fact that multi-stage fluid activities play an important role in the interaction between jadeitite and symplectitic coronas, the author focuses on the study of the composition and the occurrence of water in the symplectitic coronas of amphibole + chromite jadeite + jadeite in Myanmar amphibolite jadeitite from the micro scale point of view. The results show that: the fluid composition involved in the formation of symplectitic coronas is complex and the formation process is multi-stage. The paragentic minerals of symplectitic coronas are different , The chemical composition belt of amphibole+ chromite jadeite + + jadeite is widely developed in amphibolite jadeitite. In addition, the structural hydroxyl content of amphibole which in the core of symplectitic coronas is more uniform, and from the edge of chromite jadeite to jadeite and the jadeite is increasing regularly. The structural hydroxyl content change regulation further indicate that the forming environment of the symplectitic coronas in Myanmar jadeitite is relatively stable, which is dominated by multi-stage fluid metasomatism, without large-scale dynamic metamorphism. The evolution of the composition and water content of symplectitic coronas in Myanmar jadeitite is helpful to understand the interaction trajectory of the fluids in the subduction zone in this area, and to provide some evidence for the diagenetic mechanism of Myanmar jadeitite.