The invention discloses an autoclave for repairing a composite material. The autoclave comprises an autoclave body, a vacuum bag and a control device, wherein the vacuum bag in a working state is positioned on an electric blanket, is used for airtightly coating an area to be repaired of a component made of the composite material; a vacuum tube is led out of the vacuum bag and airtightly passes through the autoclave body; the control device comprises an inner control panel arranged inside the autoclave body and an outer control panel which is arranged outside the autoclave body and correspondingly electrically connected with the inner control panel; the inner control panel is connected with an inner controlled element to control the heating and temperature detection of the electric blanketand vacuum detection of the vacuum bag. The autoclave is convenient to use and can greatly save maintenance cost.