The invention discloses horizontal channel equipment and an installation method thereof, belonging to the field of building construction equipment. The horizontal channel equipment comprises a supporting flat plate and a guardrail, and the supporting flat plate consists of a support frame, a steel mesh piece and a guardrail insertion pipe, wherein the support frame has a flat plate type frame structure; the steel mesh piece is laid on the support frame; two sides of the support frame are uniformly provided with the guardrail insertion pipe; and the lower end of the guardrail is inserted in the guardrail insertion pipe and arranged at two sides of the supporting flat plate. The horizontal channel equipment is simple in structure, and can be wholly hoisted to a movable hand rack at a place for working aloft after integrally produced and assembled on the ground. The horizontal channel equipment has the advantages of convenient and quick installation, safety, reliability and quick construction speed. The equipment and the method can reduce hidden safety troubles caused in working aloft, shorten the installation, assembly and disassembly time of a horizontal channel, allow repeated turnover use, and decrease the material cost for construction.