Three connection united blood bag

The utility model discloses a three-bag combined blood bag. The utility model is composed of original blood bags, a blood serum bag, a pipe clamp and connection pipes between all the bags, which is characterized in that: two original blood bags and one blood serum bag 2, the bag mouth of each original blood bag is connected with two connection pipes 4 by pressure, each connection pipe 4 is provided with a pipe clamp 3 to control the on-off of the connection pipe, while a blood inlet pipe and the blood serum bag 2 are respectively connected with two original blood bags 1 through three-ways 5. Said blood serum bag 2 of the utility model is connected with a sampling bag 6 through a connection pipe; two or more groups of above three-bag are combined in parataxis to form six-bag or nine-bag. The utility model is operated in a pre-purification and disinfection closed body, the blood collection and the preparation of blood serum are completed in a combined bag, in addition, the utility model has the advantages of no pollution, very easy to use, simple manufacturing technique and even low cost.