A system for preparing a gel composite material, comprising: an impregnation platform having a worktable and a movable impregnation mechanism comprising: a fixing base capable of moving back and forth along the impregnation platform and a first unwinding device an impregnation device a second unwinding device, a third unwinding device, a first rewinding device, and a second rewinding device, which are disposed on the fixing base, wherein the first unwinding device: is configured to unwind a to-be-impregnated reinforcing body to lay the reinforcing body to be impregnated on the worktable; the impregnation device is configured to guide a prefabricated sol to the to-be-impregnated reinforcing body laid on the impregnation platform; the second unwinding device is configured to apply a covering carrier on an upper surface of the reinforcing body after impregnating; the third unwinding device is configured to unwind a spacer carrier onto a lower surface of the gelled reinforcing body on the lower surface side of the reinforcing body; the first rewinding device is configured to wind the covering carrier applied on the gelled reinforcing body; and the second rewinding device is configured to wind the gelled reinforcing body covered with the spacer carrier on one side. an impregnation platform having a worktable and a movable impregnation mechanism comprising: a fixing base capable of moving back and forth along the impregnation platform and a first unwinding device an impregnation device a second unwinding device, a third unwinding device, a first rewinding device, and a second rewinding device, which are disposed on the fixing base, wherein the first unwinding device: is configured to unwind a to-be-impregnated reinforcing body to lay the reinforcing body to be impregnated on the worktable; the impregnation device is configured to guide a prefabricated sol to the to-be-impregnated reinforcing body laid on the impregnation platform; the second unwinding device is configured to apply a covering carrier on an upper surface of the reinforcing body after impregnating; the third unwinding device is configured to unwind a spacer carrier onto a lower surface of the gelled reinforcing body on the lower surface side of the reinforcing body; the first rewinding device is configured to wind the covering carrier applied on the gelled reinforcing body; and the second rewinding device is configured to wind the gelled reinforcing body covered with the spacer carrier on one side. a fixing base capable of moving back and forth along the impregnation platform and a first unwinding device an impregnation device a second unwinding device, a third unwinding device, a first rewinding device, and a second rewinding device, which are disposed on the fixing base, wherein the first unwinding device: is configured to unwind a to-be-impregnated reinforcing body to lay the reinforcing body to be impregnated on the worktable; the impregnation device is configured to guide a prefabricated sol to the to-be-impregnated reinforcing body laid on the impregnation platform; the second unwinding device is configured to apply a covering carrier on an upper surface of the reinforcing body after impregnating; the third unwinding device is configured to unwind a spacer carrier onto a lower surface of the gelled reinforcing body on the lower surface side of the reinforcing body; the first rewinding device is configured to wind the covering carrier applied on the gelled reinforcing body; and the second rewinding device is configured to wind the gelled reinforcing body covered with the spacer carrier on one side.