The invention provides a preparation method of metal ion-doped hydroxyl silicate nanotubes. The preparation method comprises the following steps: preparing metal chloride, magnesium nitrate, sodium silicate and sodium hydroxide according to a mass ratio of 1: (20-40): (10-30): (200-450); dissolving metal chloride and magnesium nitrate into water, and then adding sodium silicate; constantly stirring for 10-30 minutes, adding sodium hydroxide, and continuing stirring for 10-30 minutes to obtain an intermediate solution; and putting the intermediate solution into a reaction kettle in a sealed manner, and reacting for 20-50 hours at 200-400 DEG C; after reaction, centrifuging, collecting precipitate, and sequentially centrifuging and washing with a solvent to obtain the metal ion-doped hydroxyl silicate nanotubes. By the preparation method of the metal ion-doped hydroxyl silicate nanotubes, provided by the invention, the defect that in the prior art, the metal ion-doped hydroxyl silicate nanotubes cannot be produced is overcome, and a prepared metal frictional wear surface self-nanocrystallizing compound preparation has higher self-nanocrystallization efficiency.