Double-jacket temperature control reaction kettle

The utility model relates to the technical field of chemical equipment, in particular to a double-jacket temperature control reaction kettle, which comprises a kettle body, an inner jacket is sleeved on the outer wall of the kettle body, an outer jacket is sleeved on the outer wall of the inner jacket, a constant-temperature solution is injected into the inner jacket, heat preservation gas is injected into the outer jacket, the inner jacket is communicated with a balance tank, and the balance tank is communicated with the kettle body. A liquid level instrument is arranged in the kettle body, the liquid level instrument senses the liquid level in the kettle and transmits data to a controller, and the controller controls the balance tank to balance the liquid level of a constant-temperature solution in the inner jacket according to the liquid level in the kettle, so that the liquid level of the constant-temperature solution in the inner jacket is kept consistent with the liquid level in the kettle; the jacket r