A controllable curved tube (100) structure, comprising a plurality of circular tubular first tube segments (10) and second tube segments (20) that are formed at intervals in series connection； the first tube segments (10) are respectively provided with C-shaped clamping portions (11) at two ends along the axial direction of the curved tube (100), and the second tube segments (20) are respectively provided with C-shaped notches (21) and spherical projections (22) matching the C-shaped clamping portions (11) at two ends along the axial direction of the curved tube (100). When connected in series, the spherical protrusion (22) of a second tube segment (20) may engage with the C-shaped clamping portion (11) of an adjacent first tube segment (10) such that the C-shaped clamping portion (11) of the adjacent first tube segment (10) may be embedded in the C-shaped notch (21) of the second tube segment (20)； during bending, the C-shaped clamping portion (11) of the first tube segment (10) may move oppositely in the C-shaped notch (21) of the second tube segment (20). The controllable curved tube (100) is formed by two types of tube segments (10, 20) having different structures being connected in series at intervals, and two ends of each type of tube segment (10, 20) are designed to be centrally symmetrical structures, which may simplify the processing procedure and improve the ease of manufacturing, while the various tube segments (10, 20) are tightly and firmly engaged with one another, and the control of a curving angle is flexible during bending.L'invention concerne une structure de tube incurvé contrôlable (100), comprenant une pluralité de premiers segments de tube (10) et de seconds segments de tube (20) tubulaires circulaires qui sont formés à des intervalles en connexion en série ； les premiers segments de tube (10) sont respectivement pourvus de parties serrage en forme de C (11) au niveau de deux extrémités le long de la direction axiale du tube incurvé (100), et l
