The invention belongs to the technical field of 
metal plastic 
forming processes, and provides a method for conducting analog 
simulation on the 
crank die 
forging process through 
computer aided engineering (CAE). The method includes the steps of extracting the parting surface chamfer of a pre-
forging die chamber, the length ratio factor of the pre-
forging die chamber and a final-forging die chamber, the 
width ratio factor of the pre-forging die chamber and a final-forging die chamber and the height ratio factor of the pre-forging die chamber and a final-forging die chamber through orthogonal experiments, and establishing a 
factor level table; forging a CAE sample and an actual 
crank by drawing a 
crank model through CAD; conducting final-forging 
load testing, wherein the maximum forming load of the pre-forging die chamber is achieved when the partial surface chamfer is 8, the length ratio is 0.998, the 
width ratio is 0.98 and the height ratio is 1.12, and the maximum final forging forming load is achieved when the partial surface chamfer is 8, the length ratio is 0.998, the 
width ratio is 0.95 and the height ratio is 1.09. The finite element principle 
analysis method which has quite high representativeness, practicability and scientificity has the advantages that workloads are reduced, implementation is easy, the optimal conclusion is obtained, the forming load is greatly reduced, the forming defects are eliminated, and the die service life is prolonged.