The invention discloses a support method used in passing a water guide fracture structure in mine exploration, belonging to an underground mining method. The support method comprises the following steps: a working roadway is tunneled along a vertical fault direction, temporary support is carried out once when tunneling forwards for 1-2 m, when the working roadway is dug to be at a distance of 5-10 m from the fault, tunneling is stopped, the working roadway is expanded and brushed, a grouting device roadway with the length of 3 m is expanded and brushed, a grouting device is provided, multiple pipe shed holes are formed from the tail end of the grouting device roadway to the fault, the pipe shed holes are located above the top wall of the working roadway, a pipe shed support is arranged in each pipe shed hole, and a grouting pipe is connected with each pipe shed hole, so that cement mortar flows into underground water of a fracture zone; the working roadway is tunneled, when the working roadway is tunneled to be at a distance of 2 m from the fault surface, tunneling is stopped, and multiple anchor rows are driven to a direction of the water guide fracture structure from a place at a distance of 2 m from the fault surface; at last, multiple drainage holes are formed from the tail end face of the working roadway to the fault direction. According to the invention, when the roadway is dug to pass the fracture structure, collapse cannot happen, a digging process is safe, and larger economic benefit can be obtained.