The utility model relates to a slip casting bolt for assembled excavation supporting for constitute excavation supporting's box type component standard component and the connection between the surrounding soil, its characterized in that: the slip casting bolt adopts the pin -connected panel, and by spiral shell cap terminal, one forms to a plurality of standard section screw rods and bolt pointedend fixed connection in proper order, spiral shell cap terminal is the member that slip casting bolt and box type component standard component are connected, the bolt is most advanced for make thingsconvenient for the slip casting bolt to squeeze into the soil body, through the length that how much changes whole slip casting bolt of standard section screw rod quantity, the standard section shankof bolt is for leading to the vast sky heart and being equipped with the injected hole.