A special effect screen and a photo booth include a special effect screen assembly. The special effect screen assembly includes a supporting frame and a special effect curtain. The supporting frame supports and unfolds the special effect curtain, so that a top projection of the special effect curtain is curved. The supporting frame includes an adjusting mechanism adjusting an arc of the top projection of the special effect curtain. The supporting frame includes a connecting base, two adjusting frames, first fasteners, and elastic supporting rods. The two adjusting frames are respectively arranged on two sides of the connecting base and are slidably connected to the connecting base. The first fasteners are configured to connect the adjusting frames to the connecting base. The elastic supporting rods pass through the special effect curtain. Two ends of each of the elastic supporting rods are respectively connected to the two adjusting frames.