When injecting steam and heating in heavy oil well production, crude oil reservoir is heated; after steam injection, BOP combination valve and stem injection valve are closed for soaking; after soaking, the BOP combination valve is opened for boosting output of crude oil; when the flowing capacity inadequate, the upper sealing segment of the bipolar optical mark seale, r is closed while its lower sealing segment is opened, and the pumping unit is stated to produce oil with rod, thereby integrating injection and production of the pumping unit.