The demolition blasting of Phase III RCC cofferdam in TGP is the highest technology difficulties in the hydro construction history. CGGC used 1920 t detonator, and successfully demolished 190,000 m3 roller compacted concrete within 12.8888 sec with patent techniques such as field emulsified explosive mixed processing, deep boring charging and transportation, high accuracy blasting cap and digital blasting cap interconnection. Its blasting scale, total charging quantity and under water difficulties situated at the first rank in the world, Hence the demolition blasting of Phase III RCC cofferdam in TGP was named as “The first blasting in the world”.