The invention provides a conduction oil evaporator. The conduction oil evaporator comprises a shell (1), a deoxygenization water inlet device (2), a water distribution layer (3), a heat exchange layer (4) and a water outlet layer (5), wherein the deoxygenization water inlet device (2) is arranged on the top of the shell (1), the water distribution layer (3), the heat exchange layer (4) and the water outlet layer (5) are arranged in the shell (1) from bottom to top, a first tube plate (6) is arranged between the water distribution layer (3) and the heat exchange layer (4), and a second tube plate (7) is arranged between the heat exchange layer (4) and the water outlet layer (5). According to the conduction oil heat exchanger, on one hand, a heat exchange tube which is easy to corrode is made of specific materials, and on the other hand, the deoxygenization water inlet device is arranged, so that the anti-corrosion capability of the heat exchanger is increased, and the service life of the conduction oil heat exchanger is greatly prolonged.