The invention discloses a radial plunger compressor, and belongs to the technical field of gas engine equipment. The radial plunger compressor comprises cams, a central shaft, an impeller, a rotor, amachine base, a plunger, rollers and short shafts. The rotor is located in an inner cavity of the machine base, the cams on both sides of the rotor are fixedly connected with the side wall of the machine base, a plurality of cylinder bodies are arranged on the rotor to be matched with the radial plunger, the middle portions of the short shafts are hinged to one end of the plunger, and the two endsof the short shafts are fixedly connected with the rollers, the rollers mesh with the profile surfaces of the cams, the central shaft is fixedly connected with the rotor and is supported on the machine base through bearings. The left and right end faces of the rotor are in plane contact with the side wall of the machine base, an axial air distribution opening for air intake and exhaust is formedin the side wall of the machine base, and the impeller is fixedly installed at one end of the central shaft to increase the air intake flux of the compressor. When the central shaft drives the rotor to rotate, the rollers push the plunger to reciprocate radially to realize air suction and compression. The radial plunger compressor has the characteristics of compact axial structure, high mechanicalefficiency, large displacement, stable operation and the like.