The invention provides a cover assembly and a cooking utensil. The cover assembly comprises a cover body, a lock cover, a linking slider, a transmission assembly and a cover board assembly, wherein the lock cover is rotatably arranged on the cover body; the linking slider is movably arranged on the cover body, the linking slider is connected with the lock cover, and the linking slider drives the lock cover to rotate when moving; the transmission assembly is movably arranged on the cover body; the cover board assembly is detachably connected with the transmission assembly, under the condition that the cover board assembly is not mounted, the transmission assembly and the linking slider form interference, so that the movement of the linking slider is limited, and under the condition that thecover board assembly is mounted, the cover board assembly pushes the transmission assembly to move towards the position avoiding the linking slider, so that the limitation of the transmission assembly to the linking slider is relieved. For the cover assembly provided by the invention, the mounting missing of the cover board assembly can be effectively prevented, when the cover board assembly is not mounted, the transmission assembly and the linking slider form interference, then the operation that the cover assembly rotates for realizing cover closing can not be realized, so that a user is reminded to mount the cover board assembly, and therefore, the use reliability and safety of the cover assembly are improved.