The invention discloses a reinforced concrete abutment of a span connection part of a double-lane multi-span beam type bridge in medium and small-size sidewalks. The reinforced concrete abutment consists of a transverse platform, two vertical platforms and a plurality of suspending and binding beams, wherein the transverse platform, two vertical platforms and a plurality of the suspending and binding beams which are connected with two ends of the vertical platforms and are arranged up and down form a shape like a Chinese character 'ri'overlooking plane figure structure; the reinforced concrete abutment is suitable for the bridge abutment which can load one trailer loading 120 tons or two common loading, and has bridge width of 5.8 meters, bridge span of between 20 and 30 meters and total span of more than or equal to 100; and the bridge abutment is suitable for being built in a stable shoal zone. Compared with the prior tetrahedral or cuboid abutment, the reinforced concrete abutment can save the use amount of concrete by 49.7 percent and construction cost by 35 to 40 percent.