Abstract: To address the issues of low efficiency, poor uniformity, and severe pollution associated with manual powder filling before pressing molybdenum billets, an automated powder filling system for molybdenum billets was designed and developed. Based on functional analysis and the principle of asymmetry in TRIZ theory, a mobile hopper with an eccentric conical bottom was optimized to significantly improve the fluidity and filling uniformity of molybdenum powder. Experimental results demonstrate that the system can automatically fill 100--250 kg of molybdenum powder within 1.5--2 min, achieving high filling uniformity. The system incorporates self-cleaning and dust removal functions, effectively preventing material cross-contamination and dust overflow. The dimensional deviations of the pressed and sintered molybdenum billets (length ≤30 mm, width ≤9 mm, thickness ≤5 mm) meet the requirements for subsequent rolling processes. This system significantly enhances production efficiency, reduces pollution and labor intensity, providing a reliable technical solution for the automated production of molybdenum billets.