Container bag sewing machine needle need a high strength of the daily work, the machine for thousands of times per minute piercing the fabric. But also in the fabric after the needle with the needle plate, rotary hook and curved needle also have contact. Container bag sewing machine needle always bear a variety of burden, especially when used in thick or with layers of fabric, making the container bag sewing machine needle bending is very likely. When the needle is deformed, the needle tip may cause the fabric to be damaged or damage the flat yarn of the container bag, or if the sewing is broken or the sewing is bad. In addition, the use of curved needle will become a container bag sewing machine jump one of the reasons.