Nonstick pan and manufacturing method thereof

A nonstick pan, comprising a pan body, wherein an inner surface of the pan body is provided with protruding dots;

• and the protruding dots are distributed in the following pattern:
• the protruding dots comprise a central protruding dot and surrounding protruding dots;
• the central protruding dot is located at a center of the inner surface of the pan body;
• the central protruding dot is surrounded by protruding dot rings, wherein the protruding dot rings are distributed from inside to outside around the central protruding dot;
• each of the protruding dot rings comprises the surrounding protruding dots separated from each other;
• and the central protruding dot and the surrounding protruding dots have a same protrusion height H;
• and
• concave portions are formed between the central protruding dot and each of the surrounding protruding dots and between the surrounding protruding dots on the inner surface of the pan body;
• and a nonstick layer is provided on the concave portions on the inner surface of the pan body, not on the central protruding dot and the surrounding protruding dots, wherein
• H=0.05-0.2 mm.