Anticorrosion high pressure reactor

The invention relates to a high pressure reactor, specifically to an anticorrosion high pressure reactor. The anticorrosion high pressure reactor comprises an outer shell and an inner container. The inner container is arranged inside the outer shell and the inside of the inner container is a cavity for containing a sample. The anticorrosion high pressure reactor is characterized in that the inner container contains a top inner-container cover and a lower inner-container tank, wherein the top inner-container cover is sealed and plugged at the top of the lower inner-container tank, and axial cross section of the cavity formed by the top inner-container cover and the lower inner-container tank is oval. By the adoption of the high pressure reactor for digestion and under high pressure, the tank effectively realizes a self-sealing effect, an inner tongue depressor and an outer tongue depressor of the top cover are wedged into a taper of the lower tank so as to be sealed. The more pressure, the sealing effect is better. Thus, high-pressure acid leakage problem is solved thoroughly. The inside of the tank is designed in an oval or round shape, making steam form an effective convection and accelerating migration of steam. Thus, digestion efficiency and effect are raised. The anticorrosion high pressure reactor designed in the patent is simple, practical and effective, and achieves sealing effect and high efficiency of sample digestion.