The invention discloses a simple oven. The oven is composed of an oven left wall, an oven rear wall, an over right wall and an oven base plate; the oven base plate is a whole iron plate, four supporting columns are welded to the bottom of the oven, each supporting column is about 1.7 meters in height and provided with a wheel bearing, and each wheel is connected with the corresponding supporting column through a wheel shaft and the corresponding wheel bearing; intermediate-layer supports and upper-layer supports are arranged in the oven; the oven is provided with an oven cover and oven drawn plates, each oven drawn plate is in a drawer shape, the width of each oven drawn plate equals to the distance between center lines of the corresponding two adjacent supports, when each layer is filled with the drawn plates, the front walls of the drawn plates at the three layers are combined into the front wall of the oven, and when the oven cover is closed, the oven is enclosed.