Based on the considerable effect to numerical simulation of exact modeling

APDL-Matlab parametric modeling programming is used.Exactly gear teeth model is built by tooth profile curve derivation.A simulation method that contact load is linear before running-in and parabolic after running-in is supposed.Then

the trace stresses curves are deduced.The tooth root maximum stress of facewidth direction and varication rule of tooth deformation on line of action are contrasted and studied under non-uniform distribution load

linear distribution load and parabolic distribution load.The end stiffness effect and the continuity of tooth root stress and tooth deformation are validated.Under non-uniform distribution load

tooth root stress and tooth deformation are simulated and the results show that maximum tooth root stress increases but the tooth root maximum deformation decrease

due to non-uniform distribution trace load and end effect.The conclusions have some theory value on tooth profile optimal design and root trace load distribution improvement.