The utility model discloses an inner pressing plate cushion block of an energy-saving daylighting roof, and relates to the technical field of architectural engineering. The inner pressing plate cushion block is square, and comprises a sawtooth surface, a contact surface with scribed lines and a mounting hole, wherein the scribed lines are positioned on the center shaft of the contact surface; the circle center of the mounting hole is formed in the center of the contact surface. The sawtooth surface is formed between an inner pressing plate cushion block of the energy-saving daylighting roof and an inner pressing plate, and under the same fastening force, the friction force is increased greatly, so that the deviation of the inner pressing plate relative to a stand column is avoided, and the mounting accuracy and the flatness of a glass panel are improved.