How can I split my leg?

Ligament is like a loose belt, which gets longer and longer.

It depends on your endurance to practice this.

As a friend said above, you should warm up first, that is, run. It is best to run and sweat.

Then in positive pressure: buckle your feet with both hands, straighten your body and feet, and then press down slowly.

Press for a while, get up and kick (toes must be slotted at 90 degrees). When you kick, you must keep your body straight and don't bend over, and then kick like a forehead ... If you can't last a month every day, I promise you can cheat.

Note: you can't practice this in a hurry, you should take it slowly, otherwise the ligament will be easily strained.