The invention relates to a metalized safety film dry high-voltage power capacitor element which comprises a shell, a core and a extraction electrode terminal. The core body is a cylinder formed by composite film layer winding on a core bar and metal spraying at two ends. The composite film layer is formed by plating a metal electrode plating layer on two layers of medium base films and transversely divided into a plurality of longitudinal unit blocks by a plurality of longitudinal inner space blank bars, grid areas are disposed on two sides of a continuous plating area in each unit block, each grid area comprises longitudinal small square block electrodes which are formed by using short-gap narrow strips to cut and separate the plating layer, one side of each small square block electrode is adjacent to the inner space blank bars, the other side of each small square block electrode is communicated with the continuous plating area through an independent conducting bridge disposed in the middle of the short-gap narrow strips, and longitudinal upward continuous functional straps are disposed on two sides of the composite film. By the dry high-voltage power capacitor element, total work voltage and capacity of the capacitor element can be increased, specific volume feature of the capacitor can be improved, raw material is saved, and temperature rise is reduced.