Biochemical engineering reaction kettle observation window

The utility model discloses an observation window of a biochemical reaction kettle. The observation window comprises a window frame and glass, the window frame is made of annular hollow stainless steel, two opposite lock catches are arranged on the center line of the front face of the window frame, two rotating shafts are further arranged on the center line of the window frame, inserting rods are arranged in the rotating shafts, ball clamps which are evenly distributed are arranged on the inner ring of the window frame, and an LED lamp is arranged on the back face of the window frame and connected with an electric wire located on the front face of the window frame. The glass is in a disc shape, a sealing strip is arranged on the edge of the glass, a hole where the inserting rod can be inserted is formed in the connecting line, passing through the center, of the glass, and a protrusion capable of enabling the lock catch to be clamped is further arranged on the connecting line, passing through the center, of th