Why can you kill Voldemort by destroying seven death horcruxes?

Judging from LZ's question, I guess LZ may have confused the "deathly Hallows" with the "Horcruxes".

Deathly Hallows refer to the three treasures of a god of death mentioned in the story of three brothers-resurrection stone, invisibility cloak and elder wand. Horcruxes refer to dividing a person's soul into many pieces by killing, storing them (this is very evil, and it is necessary to kill people. In history, wizards only made two horcruxes, while Voldemort made six at a time, and the last horcruxes were made unintentionally). In this way, he can live forever, one soul dies, and there are seven souls in the horcrux that can keep him alive (a little "cats have nine lives"). So when he killed Harry, when Abada's death curse bounced back on him, he didn't die.

Therefore, LZ should understand ~ ~