In order to analysis and improve the strength of G324 tractor frame, according to the actual condition of the tractor, we analyzed the bending and the torsional conditions which have great impact on the frame and established a finite element calculation model of the G324 tractor vehicle frame using the HyperMesh finite element analysis software. Through calculating the stress distribution of the frame in the two kinds of working conditions, we improved the frame and analyzed the stress distributions of adding L plate, changing the saddle tile wheel plate to plane plate and canceling reinforcing plate, respectively. At last, we figured out the specific model of the frame to meet strength requirements, and the results could provide references for the design and improvement of tractor frame.