Protective cover of petroleum perforation charge

The invention discloses a protective cover of a petroleum perforation charge, which is formed by a styrene butadiene styrene (SBS) through injection moulding. The protective cover is in a cylindrical shape and is sheathed outside a casing of the petroleum perforation charge, the internal diameter of the protective cover is the sum of the size of the external diameter of the casing of the petroleum perforation charge and 0.5mm, the thickness of the cylinder wall of the protective cover is 2mm, the open end of the protective cover is inwards contracted to cover and clamp the head of the casing 7 of the petroleum perforation charge, the internal diameter of the open end is smaller than the external diameter of the casing of the petroleum perforation charge by 3mm, the height of a contraction part is 1.5mm, the tail of the protective cover is provided with a convex block, the height of the convex block is 12mm, and a through hole which is provided with an explosive fuse of the petroleum perforation charge in a pe