Constant temperature pressure vessel

The invention discloses a constant temperature pressure vessel, comprising an outer shell and an inner shell. The inner shell is arranged inside the outer shell; the top of the inner shell is providedwith a feed pipe; discharge pipes are arranged at the two ends of the bottom of the inner shell respectively; the feed pipe and the discharge pipes are passed through the outer shell to the outside;the outer shell is hermetically and fixedly connected with the feed pipe and the discharge pipes; a space allowing temperature adjusting water to flow is formed between the outer shell and the inner shell; a plurality of temperature exchange fins are arranged on the outer surface of the inner shell at equal intervals and are extended along the length of the inner shell; the two ends of the outer shell are provided with an inflow pipe and an outflow pipe respectively. Corresponding temperature adjustments are made according to storage temperatures required by the different materials stored eachtime in the pressure vesse