The invention discloses a multi-slot rectifier transformer which comprises a framework, wherein the framework comprises a primary platform and a secondary platform; wire slots are arranged between the primary platform and the secondary platform; wires are wound in the wire slots to form coils; the wire slots comprise a first wire slot, a third wire slot and a third wire slot; the width of the first wire slot is equal to that of the second wire slot; the width of the third wire slot is less than that of the first wire slot and second wire slot; and the third wire slot is arranged near the primary platform or secondary platform. The multi-slot rectifier transformer has the advantages of smaller volume and cost saving.