Abstract: To resolve the problem of hard to produce heavy oil in Lukeqing oilfield,presented is the new measurement of chemical stimulation to increase production.The formula of stimulation agent is seized and optimized.Experimental re-sults show that the formula is well compatible with horizons and fluids in Lukeqing oil field with the ability to decrease the surface tension up to 90%,so the formula has high ca-pacity of reducing viscosity by emulsification and oil washing power.In the field,all eight operations are successful with accumulative oil increase as 3,027.24 t and the effective peri-od is as long as 13 months till now.