The invention relates to the technical field of audio-video projection, and specifically relates to an electric curtain with a bottom stretching type stabilizing device. The electric curtain with a bottom stretching type stabilizing device includes a main storage box, a left fixed box, a right fixed box and a piece of roller blind cloth, wherein the left fixed box is fixed at the left side of the main storage box; the right fixed box is arranged at the right side of the main storage box; the piece of roller blind cloth is arranged in the main storage box; and the internal of the right fixed box is connected with a small type low speed motor. For the electric curtain with a bottom stretching type stabilizing device, as two ends of a counterweight box are each provided with a storage groove with a roll back sucker, the electric curtain can be fixedly absorbed to a smooth surface through the suckers, so that the stability of the whole curtain is greatly improved. Besides, the angle position of the curtain can be adjusted and fixed so that the range of application of the curtain can be enlarged, and the curtain can be hidden and stored in the counterweight box without influence on using of the whole body when the curtain is not used; and a pull type switchboard is also arranged at the right end of the counterweight box to highly humanize control of the electric curtain, so that using of the electric curtain becomes more convenient.