Preparation device for magnesium oxide fiber and preparation method thereof

A preparation device for magnesium oxide fiber, comprising:

• a fiber releasing device (110) for releasing magnesium metal fiber;
• an electrochemical reaction device (120) for oxidizing the magnesium metal fiber released by the fiber releasing device (110) into magnesium hydroxide fiber, comprising a solution storage part (121), a negative electrode (122) and a positive electrode (123), wherein neutral electrolyte is stored in the solution storage part (121) to soak the magnesium metal fiber released by the fiber releasing device (110);
• a first end of the negative electrode (122) is configured for being electrically connected to the magnesium metal fiber, a first end of the positive electrode (123) is configured for being electrically connected to the neutral electrolyte, and a second end of the negative electrode (122) and a second end of the positive electrode (123) are configured for outputting electric energy;
• a heating device (130) for heating the magnesium hydroxide fiber prepared by the electrochemical reaction device (120) to obtain magnesium oxide fiber;
• and
• a fiber receiving device (140) for receiving the magnesium oxide fiber obtained after the heating of the heating device (130).