The utility model relates to a high heat dissipation rectifier bridge which comprises an insulation casing, a core assembly, an insulation layer and an aluminum base which are encapsulated in the insulation casing; the utility model is characterized in that: the insulation layer is a ceramic substrate, the middle parts of the upper and lower surfaces of the ceramic substrate, and the outer surface of the aluminum base are respectively provided with nickel coatings, and the upper and lower edge surfaces of the ceramic substrate are respectively provided with non-nickel insulating tapes. The high heat dissipation rectifier bridge has good heat dissipation effect, high dielectric voltage withstand and long service life.