The invention relates to a leaf-shaped auxiliary tooth-cleaning brush. The brush includes a brush head base, a brush tail, a brush head body, a fixing plate and a groove. Materials which can be eatenby pets are pressed into a combination shape of a toothbrush and a leaf, the prepared leaf-shaped auxiliary tooth-cleaning brush retains the aroma of the edible materials, the enthusiasm of pets in actively using the brush is increased, at the same time, the pressed leaf-shaped auxiliary tooth-cleaning brush is compact in structure, when eating the leaf-shaped auxiliary tooth-cleaning brush, the pets need big force to crush the brush, and when the gap between elliptical bulges on the brush body corresponds to the conical degree of teeth of the pets, pets can eat the brush and meanwhile the teeth of the pets are cleaned. Moreover, the two sides of the brush tail are provided with vein-shaped grooves, the whole shape of the brush is like a leaf, the ornamental value is increased, the leaf shape is a symbol of freshness, when the pets eat the brush, the teeth are closed in the vein-shaped grooves, the tooth cleaning efficiency is improved, and contact and friction are increased.