The invention discloses a double-liquid grouting mixer, which comprises a tubular shell with a mixing cavity, wherein one end of the shell is provided with a first inlet through which one kind of liquid can flow into the mixing cavity; a connection pipe through which the other liquid flows towards the mixing cavity is arranged at the other end of the shell; a core pipe is communicated with one end, which stretches into the mixing cavity, of the connection pipe; one end, which is close to the first inlet, of the core pipe is closed; through holes are formed in the side wall of the core pipe; a core ball and a jacking spring which can push the core ball to block an outlet of the connection pipe are arranged in the core pipe; and an outlet through which mixed liquid is sprayed is formed in the middle of the shell. By the double-liquid grouting mixer, water glass and cement slurry can be mixed under the condition that the pressure of the water glass is greater than elastic force of the jacking spring, and a phenomenon that the pressure of the water glass is required to be greater than that of the cement slurry in the prior art is avoided, so that the double-liquid grouting mixer is relatively wide in application range and can be used in a relatively wide pressure range.