In order to effectively improve the engine exhaust temperature and selective catalytic reduction（SCR）inlet temperature，a certain China VI heavy-duty diesel engine is taken as the research object. Based on the distribution characteristics of exhaust temperature，the combustion control area in the cylinder is divided into several intervals，and differentiated temperature control strategies are formulated for each interval. Based on the experimental verification of the effects of two exhaust thermal management technologies，namely intake throttle valve regulation and combustion parameter optimization，an adaptive exhaust thermal management strategy for the engine integrated with SCR automatic heating mode is designed. Engine bench cold world unified transient cycle（WHTC）tests and high-altitude complex road condition real vehicle verification tests are conducted to evaluate the actual effectiveness of the thermal management strategy. The results show that the influence of post injection quantity and post injection timing on exhaust temperature is significantly greater than that of rail pressure，main injection timing，and pre-injection timing. Furthermore，as the post injection quantity and timing increase，the exhaust thermal management effect gradually strengthens. When the closing degree of the intake throttle valve is not less than 70%，the exhaust temperature shows an upward trend with the increase of the closing degree of the intake throttle valve. When the engine operates at medium to high loads，it can achieve good thermal management effects by optimizing combustion parameters such as fuel injection quantity and timing. Under low load and zero load conditions，the strategy of regulating and coupling combustion parameters through the intake throttle valve can achieve good exhaust thermal management effects. Under cold WHTC conditions，the average exhaust temperature of the engine increases by about 20℃. With a weighted average fuel consumption growth rate of only 4% in cold WHTC，the NO_x specific emissions are significantly reduced（by about 30%）. In the case of long downhill slopes on the plateau，the inlet temperature of SCR can be maintained at around 370℃for a long time. The designed engine adaptive exhaust thermal management strategy can enable the engine to have good thermal management effects in harsh working conditions such as refrigeration，high altitude，and low temperature.