The invention discloses an end cap explosion-proof valve assembly of a supercapacitor and a power battery, which includes an end cap body, the left and right sides of the end cover body are respectively connected with a positive electrode aluminum plate and a negative electrode aluminum plate, the positive electrode aluminum plate comprises a positive electrode aluminum plate and a positive electrode aluminum plate, the negative electrode aluminum plate comprises a negative electrode aluminum plate and a negative electrode aluminum plate, the middle part of the end cover body is provided withan explosion-proof valve mounting hole, an explosion-proof valve is laser-welded in the explosion-proof valve mounting hole, the two ends of the positive electrode aluminum plate are riveted and connected with riveting nuts 1, and the two ends of the negative electrode aluminum plate are riveted and connected with riveting nuts 2. The positive electrode aluminum plate and the negative electrode aluminum plate of the invention are riveted with the sensor through the riveting nuts, so that the service life of the supercapacitor and the power battery can be prolonged. In addition, an explosion-proof valve is welded on the end cap body by laser, and when the gas is inflated in the supercapacitor and the power battery case, the gas case is discharged from the supercapacitor and the power battery case through the explosion-proof valve, thereby preventing the explosion caused by the accumulation of a large amount of gas, and ensuring the safety of the supercapacitor and the power battery.