Constant-temperature incubator

The invention discloses a constant-temperature incubator, which comprises an incubator body, an incubator door and a control chamber, wherein the control chamber is arranged at the upper end of the incubator body, the incubator door is hinged to the incubator body, four partition plates are evenly arranged at the bottom in the incubator body side by side, culture chambers are arranged over the position, between every two adjacent partition plates, of the bottom in the incubator body, the culture chamber is a space defined by three side plates, a top plate and a bottom plate, the three side plates are a first side plate, a second side plate and a third side plate respectively, the first side plate, the second side plate and the third side plate are connected in sequence, the bottom plate isslidably connected between the first side plate and the third side plate, the top plate is fixedly connected with the inner top of the incubator body through a telescopic device, a plurality of firstheat dissipation holes ar