Novel first-stage pile reinforcement cage positioning device

The utility model provides a novel first-stage pile reinforcement cage positioning device which comprises a first-stage groove of a first-stage pile, second-stage groove openings of an underground diaphragm wall are formed in the two sides of the first-stage groove, a reinforcement cage for concrete pouring is placed in the first-stage groove, I-shaped steel is welded to the four corners of the reinforcement cage, and the I-shaped steel is inclined. The I-shaped steel is sequentially arranged upwards from the bottom of the reinforcement cage, inclined steel plates attached to the inner wall of the first-stage groove are arranged on the end faces of the I-shaped steel, and four additional steel bars are arranged on the upper portion of the reinforcement cage and correspond to a notch of the second-stage groove. The additional steel bars can intuitively reflect the guidance of the notch of the second-stage groove, and the steel reinforcement cage is effectively limited through the I-shaped steel, so that the st