The invention discloses a pizza and a preparation method thereof. The pizza comprises the following raw materials: high-gluten flour, low-gluten flour, sugar, margarine, semi-dry yeast, an improver, edible salt, an oil core and water. The pizza provided by the invention has the following characteristics that a pizza crust is brown, the pizza is round and full in appearance, and the pizza is full and free of broken crust or cracks, has high condition uniformity, and tastes crisp and chewy. According to the pizza, the semi-dry yeast and the improver are added into the raw materials of the pizza, the yeast contributes to fermentation of dough and dough blocks, gas is released in the fermentation process, so that the pizza is more fluffy and crisper, and meanwhile, through the synergistic effect of the improver and multiple times of rubbing and rolling treatment, the toughness of a pizza blank can be well improved, and the pizza blank is not prone to break or crack in the baking process; and in addition, the preparation process of the pizza provided by the invention is simple, easy to control and suitable for mass production.