Referencing contact static strength calculation methods of involute cylindrical gear
contact static strength calculation methods of point-line meshing gear is put forward.Calculation methods are proposed in two conditions about the maximal contact stress of contact static strength.A amendment calculation formula is given about the maximal contact stress of contact static strength.A line of contact variation factor of concave convex tooth profile and load factor of single tooth C point are added.Load-bearing effect is reflected by them.