A flat display panel and manufacturing method are disclosed. The flat display panel includes a first substrate, a second substrate disposed oppositely to the first substrate. The second substrate is provided with a material layer having multiple concave slots. Multiple spacers are disposed on the first substrate and facing toward the second substrate. Wherein, multiple spacers include multiple main spacers and auxiliary spacers. The multiple auxiliary spacers respectively face toward regions which the multiple concave slots are located on, and the multiple main spacers respectively face toward regions which the multiple concave slots are not located on. A height of each main spacer and a height of each auxiliary spacer are the same such that when the flat display panel is not pressed, supporting the flat display panel through the main spacers, and when the flat display panel is pressed, further supporting the flat display panel through the auxiliary spacers.