Quick opening bag filter is a compact and easy to operate single tank pressure filtration device. The core design consists of a closed container with a quick opening top cover, which is equipped with a support basket and filter bags inside. This design enables the replacement of filter bags without the need for specialized tools, and can be quickly completed by simply opening the quick opening ring, resulting in high maintenance efficiency. It is mainly used to remove tiny suspended particles in liquids and is suitable for various applications that require fine filtration, such as material clarification, protective filtration, and pollution particle control in industries such as chemical, electronics, food and beverage.