This disclosure provides a support frame and an electronic sign. The support frame may include a base with elasticity, a first support portion including a first support plate and a first engaging portion, and a second support portion including a second support plate and a second engaging portion. Bottom ends of the first support plate and the second support plate are respectively connected to opposite ends of the base. Top ends of the first support plate and the second support plate extend in a direction closing to each other, and are disposed separately. The first engaging portion is disposed on a surface of the first support plate facing away from the second support plate, the second engaging portion is disposed on a surface of the second support plate facing away from the first support plate. Each of the two engaging portions can be respectively engaged with a display structure.