The invention provides a pool type lead-based fast reactor with labyrinth type flow channels. The pool type lead-based fast reactor comprises a reactor container, a reactor top cover, a lower end socket, a reactor core mounting component, a reactor core, a control rod, a driving mechanism of the control rod, a cold-hot pool partition plate, a first auxiliary partition plate, a heat exchanger and adriving pump. The reactor container is hermetically connected with the reactor top cover and the lower end socket; the reactor core is mounted on a mounting position of the reactor core mounting component; the control rod and the driving mechanism thereof enter the reactor container and are connected with the top of the reactor core; the reactor container is divided into a hot pool and a cold pool which do not communicate with each other by the cold-hot pool partition plate; the first auxiliary partition plate is located outside the cold-hot pool partition plate and is a certain distance awayfrom the cold-hot pool partition plate; the heat exchanger penetrates through the hot pool and enters the cold pool to realize heat conduction; and the driving pump enters the cold pool to realize coolant circulation in the cold pool. According to the invention, the complexity of components in the reactor and the flow resistance of a primary loop coolant can be reduced, and the risk that tiny bubbles or water drops enter the reactor core when a heat transfer pipe of the heat exchanger is broken can be avoided.