The utility model discloses a combined type insulation protective fence which solves the problem that measures for preventing various safety potential hazards which damage a transmission line are not proper. The combined type insulation protective fence comprises a transmission line, a right n-shaped height limiting insulation frame (1) is arranged on the right side of the transmission line, a left n-shaped height limiting insulation frame (5) is arranged on the left side of the transmission line, an insulation net (2) is arranged between the top end of the right n-shaped height limiting insulation frame (1) and the top end of the left n-shaped height limiting insulation frame (5), right noctilucent type insulation protective nets (6) are arranged on the two sides of the right n-shaped height limiting insulation frame (1) respectively, and left noctilucence type insulation protective nets (3) are arranged on the two sides of the left n-shaped height limiting insulation frame (1) respectively. The simple and practicable combined type insulation protective fence is provided for a transmission line high incidence area so as to ensure normal operation of the transmission line.