The utility model provides a construction device for bed rock double-liquid grouting. The device comprises a water stop plug, a water glass grouting pipe and a cement grouting pipe, the water stop plug is lowered to the rock surface of the bed rock grouting section; the grouting section is divided into 5m sections; the space between the water stop plug and the bed rock grouting hole is sealed; oneend of the water glass grouting pipe and one end of the cement grouting pipe respectively penetrate through the water stop plug and extend into the bed rock grouting hole; wherein one end of the water glass grouting pipe extends to the lower 15m bedrock, one end of the cement grouting pipe extends to the upper 15m bedrock, and one end of the water glass grouting pipe and one end of the cement grouting pipe are respectively provided with a grouting one-way valve. The problems that in the bed rock double-liquid grouting construction process, operation is difficult, safety is poor, the phenomenaof grout overflowing and difficult pressure maintaining often occur in the grouting process, construction is complex, cost is high, and the construction period is long are solved. The utility model belongs to the technical field of geotechnical engineering construction safety.