Deep foundation pit supporting structure on slope and construction method thereof

The deep foundation pit supporting structure on the slope comprises a transverse cast-in-place pile set which is vertically arranged, longitudinal cast-in-place pile sets are arranged at the two ends of the side edge, close to the bottom of the slope, of the transverse cast-in-place pile set, and the two longitudinal cast-in-place pile sets are perpendicular to the side edge of the transverse cast-in-place pile set; the transverse cast-in-place pile set and the longitudinal cast-in-place pile sets are each composed of a plurality of vertically-arranged cast-in-place piles, the tops of the transverse cast-in-place pile set and the tops of the two longitudinal cast-in-place pile sets are connected through a top beam, diagonal braces are arranged at the ends, away from the long sides, of the two opposite short sides of the top beam, and angle braces are arranged between the two short sides and the long sides of the top beam. One end of the angle brace is connected with the middle of the short edge of the crown b