The utility model relates to a supplementary utensil of plinth steel reinforcement cage preparation specifically is a basis steel reinforcement cage processor. It is big to have solved artifical preparation steel reinforcement cage intensity of labour, it is many to need personnel, length consuming time, the steel reinforcement cage out -of -shape of producing, ununified problem, the on -line screen storage device comprises a base, U -shaped card slot I, U -shaped card slot II, semi -closed U -shaped card slot, the fully adjustable device, plugging plate and main muscle locating plate, the both ends upside of base is fixed with the U -shaped card slot I and the semi -closed U -shaped card slot of mutual correspondence respectively, be connected with the fully adjustable device between U -shaped card slot I and the semi -closed U -shaped card slot, semi -closed U -shaped card slot's next door is equipped with the movable fixture, be fixed with main muscle locating plate on U -shaped card slot I and the semi -closed U -shaped card slot respectively, be equipped with corresponding main muscle locating hole on the main muscle locating plate at both ends, U -shaped card slot I outside end still is equipped with one row of U -shaped card slot II, the last plugging plate that is fixed with of U -shaped card slot II. The utility model has the characteristics of easy operation, improvement work efficiency.