1. Appearance: The leaves of coriander are rounder and smaller than those of celery, the main roots of coriander are thinner, and the roots of celery are generally larger.

2. Smell: The fragrance of coriander is more prominent.

3. The shape of the stem: celery has a concave channel on one side of the stem, and there is a node every 10-20 cm, while the stem of coriander bifurcates from the root.