Large gear blank production technology is difficult.The excessive deformation force and unsuccessful local filling are the main limitation of forging, and conventional materials with no deep hardening layer and easy step transition cracking are the main defects of heat treatment. Analysis of metal flow rule in the large gear blank forging process, the novel technology which based on distributary and decompression principle were proposed,  which usefully reduced deformation force by about 30%. The reasonable design of distributary and decompression groove could make wheel hub and rim fill simultaneously. To improve the non\|uniform flow, the novel technology was further improved with unsymmetrical punch. Based on the analysis of microstructure and prosperities, high harden ability materials heat treatment technology of normalizing and stepped quenching was proposed, which can avoid cracking and deformation. Grain size reaches grade seven. The novel technology which meets the needs of users was further validated by numerical simulation of coupled thermo\|mechanical, experimental verification, microstructure observation and performance analysis.