The invention discloses an oil and water cooler, and belongs to the field of the structural design of coolers. According to the oil and water cooler, the bottom surface of a water cooling body and the top surface of an oil cooling body are firmly connected through bolts, a rubber sponge sealing strip is installed between the bottom surface of the water cooling body and the top surface of the oil cooling body in a pressed mode, direct contact between the water cooling body and a metal surface of the oil cooling body is avoided, and therefore the problem that the contact surface is collided in the long-time work process of the oil and water cooler is prevented. The oil and water cooler overcomes the defect that a cooler in the prior art can only cool one kind of media, thereby realizing the purpose of cooling two or more kinds of media and improving cooling efficiency. Meanwhile, the oil and water cooler is simple in structure, flexible to connect and detach and easy to apply widely.