Double-layer water chamber structure of heat-dissipating water tank

The invention discloses a double-layer water chamber structure of a heat-dissipating water tank. The double-layer water chamber structure of the heat-dissipating water tank comprises a big water chamber. An upper main plate is arranged in the big water chamber. Pipeline holes and water chamber fixing holes are formed in the upper main plate. A first small water chamber and a second small water chamber are fixed to the water chamber fixing holes. A spacer is arranged in the second small water chamber. According to the structure, different flow path channels in the big water chamber are sealed through the two small water chambers in the big water chamber correspondingly, so that two independent small water tank bodies are formed in the big water chamber, and the two small water tank bodies do not circulate or communicate with each other, so that the heat dissipating function of the water tank is improved, the water tank is better protected, and the problem that due to the fact that an external water tank body i