The utility model relates to steel formwork technical field, especially a prefabricated
assembly type steel formwork of gate chamber energy dissipation cover plate. The prefabricated
assembly type steel formwork includes bottom die, with the side die of bottom die through the guiding component connection and with bottom die and side die through the fixed component connection core mould respectively, the core mould is located inside side die, bottom die, side die and core mould form the pouring space for pouring gate chamber energy dissipation cover plate in common, the supporting leg of gate chamber energy dissipation cover plate that pours is upwards, both sides of core mould are provided with first dismantle piece. The above technical scheme can guarantee the apparent quality of energy dissipation cover plate, and can improve construction efficiency and size control accuracy.