The invention discloses a safety hook at least comprising a hook body, a valve and a control handle. The hook body is provided with a hook hole penetrating through the front and rear faces of the hookbody, and one side of the hook body is provided with a hook port communicating with the hook hole; the other side of the hook body is provided with a first space concavely, and the bottom end of thefirst space is a brake surface; one end of the valve is pivoted below the hook port through a first shaft, and the valve is pushed through a spring for closing the hook port, and the valve is connected with baffles along the front and rear sides of the hook body; the control handle wraps the two baffles through two coaming plates correspondingly, and the two coaming plates are pivoted on the hookbody through second shafts; the two coaming plates are each provided with a recess though stamping forming, and opposite limiting blocks protrude from the inner faces of the two coaming plates; each limiting block is provided with an upper stop surface and a lower stop surface which are opposite up and down, and the upper stop surface and the lower stop surface are perpendicular to the coaming plates; when bearing the opening stress due to touch of the valve by mistake, the upper stop surfaces and the lower stop surfaces are able to transfer the stress between the hook body and the valve stably, so that the valve and the limiting blocks have the inventive steps that the valve and the limiting blocks are not liable to deform and are longer in service life; and the overall use safety is improved greatly.