The invention provides a control method for preventing core pulling in coil discharging of a strip steel coiling machine. When the coiling machine is prepared to start to discharge coils, a coil-discharging trolley control PLC is used for controlling a coil-discharging trolley to ascend at low pressure; after the coil-discharging trolley makes contact with a steel coil, the coil-discharging trolley control PLC controls the coil-discharging trolley to ascend at high hydraulic pressure; high pressure is utilized for compensating for decrease of the height of a hydraulic cylinder, caused by dead weight of the steel coil after retraction of a central spindle of the coiling machine, of the coil-discharging trolley, and it is avoided that the height of the hydraulic cylinder of the coil-discharging trolley is decreased, so that the inner ring of the steel coil makes contact with a rubber roll of the central spindle. The height of the coil-discharging trolley is kept stable, it is effectively avoided that after the central spindle of the coiling machine retracts, the inner ring of the steel coil makes contact with the rubber roll of the central spindle, the situation that when an exit trolley discharges coils, core pulling of the steel coil happens is greatly reduced, the replacement period of the roll of the central spindle of the coiling machine is prolonged, cost for spare parts is saved, the production cost of the strip steel is reduced, the defective rate of the strip steel is decreased, the service life of the roll of the central spindle of the coiling machine is prolonged, and normal production is guaranteed.