Gas-liquid separator and hydrogen production system

The utility model discloses a gas-liquid separator and a hydrogen production system, and belongs to the technical field of water electrolysis hydrogen production. The gas-liquid separator comprises a shell, a first baffle and a first separation structure, and the first baffle is installed in the shell and used for converting the flow direction of a gas-liquid mixture flowing into the shell into the vertical direction from the horizontal direction; the first separation structure is installed in the shell and used for converting the flow direction of the gas-liquid mixture from the vertical direction to the horizontal direction so as to carry out gas-liquid separation. The first baffle and the first separation structure are arranged in the gas-liquid separator, so that a gas-liquid mixture flowing into the shell sequentially collides with the first baffle and the first separation structure, and the flow direction is converted from the horizontal direction to the vertical direction and then to the horizontal dir