A needle guiding bracket with adjustable angles, comprising a bracket body configured to cooperatively mounting with an ultrasound probe, a mounting base arranged on the bracket body, and an angle block rotationally connected with the mounting base, wherein the angle block and the mounting base are rotationally connected at corresponding first ends, and a corresponding limiting structure is provided between the angle block and the mounting base to enable the angle block and the mounting base to only rotate relative to each other, and the angle block is also provided with configurations for mounting a needle guide or directly forming a needle tract, wherein a second end of the angle block opposite to the first end is provided with at least one elastic arm (133a, 133b), and a raised positioning platform (134a, 134b) extending perpendicular to a rotation plane of the angle block is provided on the elastic arm (133a, 133b); a corresponding second end of the mounting base is provided with at least one group of angle gear grooves (1214, 1224, 1224a, 1224b, 1224c) that cooperates with the raised positioning platform (134a, 134b) of the at least one elastic arm (133a, 133b) for the raised positioning platform (134a, 134b) to be embedded therein such that a fixed angle is formed between the angle block and the mounting base; characterised in that the angle block is further provided with an elastic element which applies elastic force to the elastic arm (133a, 133b) to urge the raised positioning platform (134a, 134b) to be embedded within the angle gear grooves (1214, 1224, 1224a, 1224b, 1224c); and the mounting base is provided with a track block, and the track block has an undercut; and an elastic rail arm extends from the angle block opposite to the track block, and the elastic rail arm has an elastic barb which is just locked with the undercut when the angle block is rotated to a maximum angle relative to the mounting base. a second end of the angle block opposite to the first end is provided with at least one elastic arm (133a, 133b), and a raised positioning platform (134a, 134b) extending perpendicular to a rotation plane of the angle block is provided on the elastic arm (133a, 133b); a corresponding second end of the mounting base is provided with at least one group of angle gear grooves (1214, 1224, 1224a, 1224b, 1224c) that cooperates with the raised positioning platform (134a, 134b) of the at least one elastic arm (133a, 133b) for the raised positioning platform (134a, 134b) to be embedded therein such that a fixed angle is formed between the angle block and the mounting base; characterised in that the angle block is further provided with an elastic element which applies elastic force to the elastic arm (133a, 133b) to urge the raised positioning platform (134a, 134b) to be embedded within the angle gear grooves (1214, 1224, 1224a, 1224b, 1224c); and the mounting base is provided with a track block, and the track block has an undercut; and an elastic rail arm extends from the angle block opposite to the track block, and the elastic rail arm has an elastic barb which is just locked with the undercut when the angle block is rotated to a maximum angle relative to the mounting base.