The invention discloses a reinforcing method and a supporting assembly for an integrated cooker smoke exhaust pipe. The reinforcing method includes the following steps that (a), clamping protection plates are assembled; (b), a reinforcing position is determined; (c), side clamping rods are mounted; (d), upper and lower clamping protection is carried out; and (e), left and right connection is carried out. The supporting assembly comprises a mounting plate, a supporting block is arranged on the mounting plate, a fixing screw is arranged on the supporting block, and supporting nuts and the clamping protection plates are connected to the fixing screw. The clamping protection plates comprise telescopic plates and arc-shaped protection plates, the arc-shaped protection plates are arranged on thetelescopic plates, the supporting nuts support the telescopic plates, and the side clamping rod are arranged between the arc-shaped protection plates. The reinforcing method is easy to operate, low in difficulty, wide in reinforcing range, good in reinforcing effect and easy to adjust, the reinforcing quality can be effectively guaranteed, the problem caused by the fact that the hole size of a kitchen cabinet plate is not matched with the pipe diameter of the smoke exhaust pipe is solved, and the supporting assembly is novel in structure, capable of being flexibly assembled on site, high in adaptability, good in supporting effect and reliable to use.