Abstract: The hydrogen production capacity of immobilized photosynthetic bacteria(PSB) cells on different Absorb material was investigated. Results indicate that they have different extensive improvement compared with free PSB cells. Hydrogen production capacity of the bigger ceramsite is the best. The amount of hydrogen production equal to 452.7 mL, which is 2.16 times for free PSB cells on average, and velocity is 1.95 times. The capacity of the smaller ceramsite followed, its amount is 1.72 times, and velocity is the 1.73 times as much as free PSB cells. The hydrogen production capacity of Pebbles and macroporous resin is lower than ceramsite, but higher than free PSB cells. The amount of hydrogen production respectively is 1.43 and 1.09 times, and its velocity is 1.34 and 1.08 times, compared with free PSB cells. The study also finds that immobilized PSB not only can improve hydrogen production capacity, but also can improve ratio of hydrogen and extend hydrogen production time.