The invention relates to a linear equal-thickness separating screen, and belongs to the field of equal-thickness vibrating screens. The linear equal-thickness separating screen comprises a linear equal-thickness vibrating screen body, wherein a material well-distributing mechanism is arranged at a feed opening of the linear equal-thickness vibrating screen body; the material well-distributing mechanism comprises a material well-distributing cavity, a material well-distributing plate is arranged in the material well-distributing cavity, an inlet and an outlet of the material well-distributing cavity are respectively located in both sides of the material well-distributing plate, and materials at the inlet of the material well-distributing cavity are transferred to the outlet of the material well-distributing cavity by rotating the material well-distributing plate. Uniform feeding is realized, the uniform material distribution of the equal-thickness separating screen can be effectively realized, the uniform material distribution can be favorable for the equal-thickness effect of the device, the usability of the device is increased, the separating efficiency and the separating quality are increased, the problem of incapability of equal-thickness feeding because a horizontal separating screen is not installed can be solved, and the adaptability of the device is increased.