In order to realize the transverse flux induction heating (TFIH) of aluminum tubular oil cooler, and to solve the problem of the erosion of pipe end and low pass rate of the conventional plane coil, a new conical coil is designed to replace the conventional plane coil. The electromagnetic-thermal coupling simulation was carried out by COMSOL software based on variable physical properties, the temperature distribution, heating curve, current density distribution, joule heat distribution of aluminum tubular oil cooler and influences of conical angle on heating effect are analyzed. The results show that aluminum tubular oil cooler has a good temperature distribution under the new conical coil, avoiding the erosion of pipe end and the pass rate is above 95%. The pipe end temperature is monitored by temperature sensor, and the relative error of coupling simulation is less than 4%. The results show that the coupling simulation has a certain accuracy. This study can guide industrial design and production, and provide TFIH coil solutions for aluminum tubular oil cooler.