The invention discloses a steam generation assembly, a cooking device and a steam generation method, the steam generation assembly comprises a first pipe, a first heating piece, a second pipe and a second heating piece, one end of the first pipe is provided with a water inlet and used for being communicated with a water pipe of the cooking device, and at least part of the first heating piece is arranged in the first pipe. One end of the second pipe is provided with an air outlet and used for being communicated with a cooking cavity of the cooking device, the second pipe and the first pipe arearranged at intervals, the other end of the second pipe is communicated with the other end of the first pipe, and at least part of the second heating piece is arranged in the second pipe. The first pipe and the second pipe are arranged in parallel at intervals, at the moment, the thickness of the steam generation assembly is small, the steam generation assembly can be arranged at any position of the bottom, the top, the left side portion, the right side portion or the rear portion of a box body of the cooking device, and therefore the convenience of arrangement and installation of the steam generation assembly is improved. In addition, the steam generation assembly is simple in structure and manufacturing process, and the manufacturing cost is effectively reduced.