The utility model discloses a roof anti-leakage deformation joint structure which comprises a compression spring, a through hole with the diameter larger than the outer diameter of a connecting bolt is formed in a sliding rod, a limiting piece is arranged on the connecting bolt, the connecting bolt is sleeved with the compression spring, the compression spring is located between the sliding rod and the limiting piece, and the sliding rod is located between a cover plate and the limiting piece. Openings of the two guide grooves are oppositely formed, the cross section of each guide groove is ina C shape with the opening angle being alpha, the thickness of the sliding rod is h, the diameter of each guide groove is R, alpha is larger than or equal to 90 degrees and smaller than 180 degrees,h is equal to R * sin beta, and alpha-2 beta is larger than or equal to 20 degrees. Openings of guide grooves are enlarged, the thickness of the sliding rod is controlled; the sliding rod can swing inthe guide groove while sliding in the guide groove, and the limit of the connecting bolt to the swing of the sliding rod is reduced through the arrangement that the through hole is larger than the outer diameter of the connecting bolt, so that the deformation joint structure of the scheme can achieve compensation in the X direction, the Y direction and the Z direction, and the effect of integrating stretching, sedimentation and shock prevention is achieved.