Trash bag openner machine is one of the important sorting equipment in the comprehensive disposal system of urban domestic garbage and mixed garbage. Trash bag openner machine integrates multiple functions such as bag breaking, crushing and screeding. It is suitable for the destruction of bagged garbage and is convenient follow-up disposal of garbage. Two sets of knife plates installed on the shaft rotate in counter-rotating, so as to achieve the purpose of bag breaking and crushing. It has the advantages of small size, convenient operation and high crushing efficiency.