The utility model discloses a plug and thin -wall tube bending processing equipment for thin -wall tube is crooked. The plug includes the plug body, still including hinging a plurality of universal ball head in proper order mutually, the one end that lies in the universal ball head of head end among a plurality of universal ball head hinges in the one end of plug body the plug, and the other end lies in the plug, and this is external, and all the other universal ball head all lie in the plug, and this is external, a plurality of universal ball head's articulated swing direction and the crookeddirection unanimity of treating crooked straight tube, in a plurality of universal ball head were used for wearing to locate to treat the lumen of crooked straight tube, the plug body was located outside the lumen of treating crooked straight tube. Thin -wall tube bending processing equipment includes as above the plug. The utility model discloses can make and treat that crooked straight tube cannot produce the flat deformation situation of bending section when crooked, just can guarantee crooked uniformity and high accuracy when thin -wall tube is crooked, improve the crooked efficiency ofpipe fitting, guarantee to promote even the finished product quality after the pipe fitting bending effectively.