The invention relates to a method for controlling oil charge and gearshift of clutches of a double clutch-type speed changer.An oil charge method comprises following steps: filling an oil chamber with oil liquid based on target pressure in the first phase; continuously filling the oil chamber with oil liquid based on target pressure in the second phase in order to compress a reset spring; stabilizing oil liquid of the oil chamber based on target pressure in the third phase; gradually decreasing target pressure in the second phase from first pressure value to second pressure value, wherein first pressure value is initial pre-filling oil pressure value set when the reset spring is compressed in the second phase; and adjusting the first pressure valu eif difference between the integral quantity of the clutch pressure in the third phase and the integral quantity of the target pressure in the third phase is not within the threshold scope. The method for controlling oil charge and gearshift of clutches of the double clutch-type speed changer helps to achieve gearshift stability of the clutches when the clutches are subjected to gearshift by controlling oil charge of the clutches.