This concrete mixer is a mixer that relies on the friction drive of a rubber roller. This mixer is a roller concrete mixer that rotates forward and reverses. It is possible to mix plastic and semi-dry concrete. It is a type of equipment between a forced mixer and a civilian mixer. The utility model has the advantages of low noise, stable operation, convenient operation and movement, good mixing quality and high production efficiency. Applicable to general construction sites, roads, bridges, hydropower and other projects.