The invention relates to a full screen projection system with a double helix screen, comprising a projector and a rotating double helix screen, wherein the projector is located above the rotating double helix screen; through adjusting the space position of the projector, the relative position between the projector and the double helix screen is adjusted so that the center of a projection image light path projected by a lens on the projector is coincident with the center of the double helix screen, and a rectangle image surface at the lower end of the projection image light path is internally connected with an overlooking circle surface of the double helix screen, and thus full screen projection display in a cylinder is realized on the rotating double helix screen. The structure utilized in the invention is easy for implementation; because the rotating double helix screen with a certain vibration is separated from the projector, the imaging stability is increased; and because an extra optical element is not needed for changing the light path, the alignment error can be reduced, and a clear real three-dimensional image can be obtained.