The invention discloses a single-
crystal magnesium alloy wire for acupoint catgut embedding and weight losing and a preparation method of the single-
crystal magnesium alloy wire, the
chemical composition expression of the single-
crystal magnesium alloy wire is Mg-yM-zR, in the formula, y and z represent the
mass fraction of M and the
mass fraction of R in
magnesium alloy respectively, y is larger than or equal to 1.2 and smaller than or equal to 1.7, z is larger than or equal to 0.3 and smaller than or equal to 0.8, and the balance is Mg; m is one of Sr, Ce and Co, and R is one of Ge, Sm and Dy; the wire is prepared through the processes of
smelting and
casting, homogenizing treatment, hot
extrusion, multi-pass cold drawing, intermediate annealing and zone
smelting and
directional solidification, and has uniform and controllable degradation rate, excellent
mechanical property and
biocompatibility; after the catgut embedding slimming agent is embedded into the
acupuncture point of a
human body, fat
metabolism is promoted through mild and lasting
physical stimulation and chemical
ion regulation,
intergranular corrosion and premature fracture caused by a polycrystalline structure are avoided, and the safety and durability of a catgut embedding slimming therapy are improved.