▎ 摘　　要

NOVELTY - A composite material comprises 0.01-20 wt.% graphene, 0.01-50 wt.% silicon carbide, 30-99.5 wt.% magnesium or magnesium alloy, 0.01-50 wt.% reinforcing agent, and balance inevitable impurities. USE - Composite material for soluble bridge plug (claimed). ADVANTAGE - The composite material has high strength and is degraded in water to meet the performance requirements of soluble bridge plug. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) processing device for composite material for soluble bridge plug; and (2) preparation of composite material for soluble bridge plug.