The invention discloses a runway seat. The runway seat comprises a runway seat body and a guide rail base which is integrally arranged with the runway seat body, wherein the two opposite sides on the runway seat body are respectively provided with a crankcase mounting surface assembled with a crankcase and a cylinder sleeve mounting structure used for mounting a cylinder sleeve; the runway seat body is further provided with a through hole which penetrates the thickness direction of the runway seat body and forms openings in the crankcase mounting surface and the cylinder sleeve mounting structure, and the through hole is called as a piston rod through hole; the guide rail base is arranged on one side of the runway seat body which is the same as the crankcase mounting surface, and a guide rail for guiding a reciprocating motion member is arranged at the top of the guide rail base; and the central line of the guide rail base and the centre of the piston rod through hole are staggered by a preset distance. The runway seat and the crankcase as well as the cylinder sleeve are in a separated structure, so that a combined engine body which uses the runway seat can be conveniently processed and the manufacturing cost is low. The invention further discloses equipment applying the runway seat.