A method for making an integrated capacitor, comprising: a shell; a sealing body; a cover plate; a capacitor core; a guide pin; and a positioning boss; the cover plate being provided with an inner cavity; wherein the method comprises steps of: a) inserting the capacitor core into the inner cavity of the cover plate such that the capacitor core is integrally sleeved in the inner cavity of the cover plate with a top end surface and a side surface of the capacitor core being completely covered by the cover plate; wherein a side wall of the inner cavity of the cover plate fits the capacitor core; the guide pin is connected to the capacitor core; the cover plate is provided with a third through hole; the guide pin passes through the third through hole to protrude from an upper end surface of the cover plate; the positioning boss is fixedly arranged on the upper end surface of the cover plate; b) installing the cover plate integrally sleeved with the capacitor core in the shell for packaging such that a bottom end surface of the capacitor core and an outer side wall of the cover plate are completely covered by the shell; wherein the outer side wall of the cover plate fits an inner wall of the shell; the top end surface of the capacitor core faces the upper end surface of the cover plate and the bottom end surface of the capacitor core faces a bottom surface of the shell; and c) forming the sealing body by injection molding on the upper end surface of the cover plate to seal an opening of the shell such that the sealing body and the shell are integrally packaged; wherein the guide pin and the positioning boss pass through the sealing body to protrude from the sealing body. a shell; a sealing body; a cover plate; a capacitor core; a guide pin; and a positioning boss; the cover plate being provided with an inner cavity; wherein the method comprises steps of: a) inserting the capacitor core into the inner cavity of the cover plate such that the capacitor core is integrally sleeved in the inner cavity of the cover plate with a top end surface and a side surface of the capacitor core being completely covered by the cover plate; wherein a side wall of the inner cavity of the cover plate fits the capacitor core; the guide pin is connected to the capacitor core; the cover plate is provided with a third through hole; the guide pin passes through the third through hole to protrude from an upper end surface of the cover plate; the positioning boss is fixedly arranged on the upper end surface of the cover plate; b) installing the cover plate integrally sleeved with the capacitor core in the shell for packaging such that a bottom end surface of the capacitor core and an outer side wall of the cover plate are completely covered by the shell; wherein the outer side wall of the cover plate fits an inner wall of the shell; the top end surface of the capacitor core faces the upper end surface of the cover plate and the bottom end surface of the capacitor core faces a bottom surface of the shell; and c) forming the sealing body by injection molding on the upper end surface of the cover plate to seal an opening of the shell such that the sealing body and the shell are integrally packaged; wherein the guide pin and the positioning boss pass through the sealing body to protrude from the sealing body. a) inserting the capacitor core into the inner cavity of the cover plate such that the capacitor core is integrally sleeved in the inner cavity of the cover plate with a top end surface and a side surface of the capacitor core being completely covered by the cover plate; wherein a side wall of the inner cavity of the cover plate fits the capacitor core; the guide pin is connected to the capacitor core; the cover plate is provided with a third through hole; the guide pin passes through the third through hole to protrude from an upper end surface of the cover plate; the positioning boss is fixedly arranged on the upper end surface of the cover plate; b) installing the cover plate integrally sleeved with the capacitor core in the shell for packaging such that a bottom end surface of the capacitor core and an outer side wall of the cover plate are completely covered by the shell; wherein the outer side wall of the cover plate fits an inner wall of the shell; the top end surface of the capacitor core faces the upper end surface of the cover plate and the bottom end surface of the capacitor core faces a bottom surface of the shell; and c) forming the sealing body by injection molding on the upper end surface of the cover plate to seal an opening of the shell such that the sealing body and the shell are integrally packaged; wherein the guide pin and the positioning boss pass through the sealing body to protrude from the sealing body.