The utility model discloses a multifunctional mattress, comprising springs arranged in the multifunctional mattress, pad nets arranged on the upper and lower two sides of the springs, an external layer for the pad nets and a sparse material layer arranged on periphery of the pad nets. A detachable heat isolation layer is arranged out of the sparse material layer, and the heat isolation layer is the external casing formed by three side surfaces and one front surface; the heat isolation layer is bound to the mattress in the form of the binding button. The utility model often adopts the sparse cloth layer as the external layer of the mattress; the side surfaces and front surface all have the air permeability, which improves the air flowability. The air convection is formed so as to emit the heat of the human body to a certain extent, and consequently, the cool effect is achieved in the summer. The multifunctional mattress is used in the winter, the heat isolation external casing is bound to the mattress, which realizes the heat isolation effect in a certain extent.