The utility model relates to a biological detection field, in particular to a microbiological incubator for biological detection, the power distribution box comprises a box body, be equipped with in the box and hold the chamber, it is equipped with the response subassembly and rocks the subassembly to hold the intracavity, it includes the bearing platform to rock the subassembly, the connecting rod, the actuating lever, the track plate, rotary sleeve and motor, the lower extreme of bearing platform is equipped with the slider, the lower extreme of slider rotates with the one end of connectingrod to be connected, the other end of connecting rod rotates with the one end of actuating lever to be connected, the connecting rod is equipped with planetary axis with the lower extreme of the junction of actuating lever, the actuating lever is pegged graft in the rotary sleeve, the output of motor passes the central of track plate and is connected with the lower extreme transmission of rotary sleeve, the upper end of track plate is equipped with and supplies the gliding spout of planetary axis, the lower extreme of box is equipped with the cell body, be equipped with the controller on the box, motor and controller electric connection, the utility model discloses can adjust its inside environment according to the growth conditions of different microorganisms to adaptation A variety of microorganisms's growth.