The invention discloses a ground jetting type jet apparatus used for a water curtain partition in a tunnel fire hazard. The ground jetting type jet apparatus comprises a high pressure water source access port and a high pressure atomizing sprayer 1, the ground jetting type jet apparatus further comprises a sprayer installation component and a sprayer protection component, the sprayer protection component can be installed in front of the spraying direction of the sprayer on the sprayer installation component, and the sprayer protection component is used for preventing against the mechanical impact and/or blockage of the sprayer by a destroying article in front of the spraying direction of the sprayer. The ground jetting type jet apparatus has the beneficial effects that the ground jetting type jet apparatus used for the water curtain partition in the tunnel fire hazard provides a fire control scheme for the fire hazard in the space of a tunnel, and solves the problems of controlling fire source isolation and fire spreading in case of the fire in the special environments like the tunnel. Compared with the top jetting type structure, the water curtain partition formed by the ground jetting structure is more even and denser, the thermal insulation effect is good, the provided ground jetting sprayer protection structure effectively protects the sprayer, and the durability and the stability of equipment are guaranteed.