The invention relates to the field of cement, in particular to a multi-volume-weight magnesium oxysulfate foam insulation board as well as production equipment and a process thereof. The production equipment comprises a control system, a material storage system, a material batching system, a stirring system, a material distributing system, a material collecting system, a mould box and rail system, an operation system, a de-molding system, and a cutting and packaging system, wherein the material storage system, the material batching system, the stirring system, the material distributing system and the material collecting system are sequentially connected; and under the transfer of the operation system, the mould box and rail system connects the material collecting system with the de-molding system and the cutting and packaging system. The equipment and the process can simultaneously produce a plurality of magnesium oxysulfate foam insulation boards with different volume weights in a seamless manner, so that foamed inorganic magnesium oxysulfate products can be continuously, automatically and efficiently produced, and therefore, the reliability is high, the manufacturing cost is low and the production efficiency is high.