The utility model provides a connecting joint for a double-mortar grouting pipe and a high-pressure pipe. The connecting joint comprises a steel floral grouting pipe, the upper portion of the steel floral grouting pipe is connected with a three-way connector through a rubber tapered pipe joint, and the other two connecting ports of the three-way connector are connected with high-pressure pipe joints respectively; a clamp plate is arranged on a pipe body of the steel floral grouting pipe and is fixedly connected together with a cover plate of the top end of the three-way connector through bolts. Due to the integral fixture, the grouting process is free of mortar leakage and pressure losses, the connecting joint is easy to disassemble in the construction process and not prone to be blocked, so that a safe and reliable guarantee is provided for high-pressure grouting, high-pressure injury to people and overflows are prevented, construction safety and quality are ensured, the connecting joint is simple in structure, economical and affordable and solves the problem that a tunnel grouting construction connector is difficult to connect, and meanwhile a guarantee is provided for tunnel construction safety due to the improvement of grouting efficiency.