The invention relates to a double-head sewing machine for a cement woven bag sheet, comprising a back bag piling platform (25), a back transmitting mechanism (24), a pressing wheel mechanism (19), a main transmitting mechanism, a quick conveying mechanism (3), a bag collecting baffle plate (2) and a bag collecting machine (1) which are sequentially arranged; wherein the back transmitting mechanism (24) comprises a back transmitting belt (30), a driving wheel, a tension wheel mechanism (23), an auxiliary driving motor (18) and a belt (17); the pressing wheel mechanism (19) comprises a pressingwheel, a pressing wheel support (33) and a pressing wheel cylinder (32) and is controlled by a control system (35); the main transmitting mechanism comprises a main driving motor (6), a main driving wheel mechanism (7), an auxiliary driving wheel mechanism (8), an auxiliary driving wheel mechanism (14), a tension mechanism (9), a tension mechanism (13), a tension mechanism (16), a main driving auxiliary mechanism (20), a main transmitting belt (29), an auxiliary transmitting belt (26) and a pressing mechanism (10); and the quick conveying mechanism (3) comprises a conveying motor (5), a belt (4) and an auxiliary wheel. The double-head sewing machine provided by the invention has the advantages of increasing the yield, saving the material and improving the finished product quality.