The utility model relates to a closed anti-explosion tank which is composed of a top cover, a tank body and trundles. The top cover, the tank body and a tank body bottom are all of a multihole composite structure, and the multihole composite structure is composed of a plurality of layers of multihole steel plates, multihole inorganic nonmetal energy absorption materials and metal wire cotton-shaped energy absorption materials, wherein the multihole inorganic nonmetal energy absorption materials and the metal wire cotton-shaped energy absorption materials are filled among the multihole steel plates. The top cover is connected with the tank body through a spindle, and the axis of the spindle is parallel to the axial direction of the tank body. The trundles are fixedly arranged at the bottom of the tank body. A fixing device is further arranged between the tank body and the top cover. By means of the closed anti-explosion tank, explosion energy can be evenly released towards the periphery by 360 degrees, the fact that the explosion energy is concentrated on a certain direction to be released can be avoided, the released energy can be guaranteed to be within a safety range as well, and the damage on human bodies and buildings can be avoided. The closed anti-explosion tank is simple in structure, capable of achieving manual fast moving and top cover quick opening without the need for devices such as a hydraulic pressure system and a vehicle-mounted system, and safe and reliable to operate.