Multi-cable fixing clamp capable of being quickly disassembled and using method

The clamp comprises an upper pressing strip and a lower pressing strip, the upper pressing strip is provided with upper arc-shaped grooves distributed in a left-right spaced mode, the two ends of the upper pressing strip are correspondingly provided with a left U-shaped clamping groove and a right U-shaped clamping groove, and the upper pressing strip is provided with a supporting lug extending downwards on the inner side of the left U-shaped clamping groove. The lower pressing strip is provided with a lower arc-shaped groove corresponding to the upper arc-shaped groove, the two ends of the lower pressing strip are correspondingly provided with a left shaft hole and a right shaft hole, the lower pressing strip is provided with an oblong hole in the inner side of the left shaft hole, a left pin shaft is installed in the left shaft hole, a left eyelet bolt is installed on the left pin shaft, a left butterfly nut is screwed on the left eyelet bolt, and a right pin shaft is installed in the right shaft hole; a ri