The invention discloses a gas-solid composite hydrogen storage tank. The gas-solid composite hydrogen storage tank comprise an outer tank body, an inner tank body, hydrogen storage alloy, a gas guidepipe, an inner circulation water channel, a supporting plate and a hydrogen valve. The inner tank body is fixed in a cavity of the outer tank body through the supporting plate. The supporting plate iswelded to an outer shell of the inner tank body. The inner tank body loaded with the hydrogen storage alloy is provided with the porous gas guide pipe in the axial direction. Filters are arranged atthe two ends of the porous gas guide pipe. The gas-solid composite hydrogen storage tank disclosed by the invention is low in cost, simple in structure and easy to manufacture, has the characteristicsof high volume density of solid hydrogen storage and good hydrogen desorption dynamic performance of high pressure gas hydrogen storage, and is suitable for large-scale hydrogen storage of power gridhydrogen energy storage.