The present invention provides an elastic washer structure and a fastener, including: an elastic washer (1) and one or more tongues (2), where the elastic washer (1) is a sheet object with an inner hole (3), one surface of the elastic washer (1) is a convex surface, the other surface is a concave surface, a tongue (2) is disposed towards a side of the convex surface on an outer edge of the elastic washer, an angle between the tongue (2) and a surface (5) on which the outer edge of the elastic washer is located is a first angle (6), and when the convex surface of the elastic washer bears pressure, there is a negative correlation between the first angle (6) and the pressure borne by the elastic washer.