Loader is a kind of earthwork construction machinery which is widely used in highway, railway, construction, hydropower, port, mine and other construction projects. It is mainly used to shovel and load soil, sand, lime, coal and other bulk materials, and can also do light digging operation for ore and hard soil. Different auxiliary working devices can also be used for bulldozing, lifting and loading and unloading of other materials such as wood.
In road construction, especially in high-grade highway construction, loaders are used for filling and excavation of subgrade engineering, aggregate and loading of asphalt mixture and cement concrete stockyard. In addition, it can also be used to push and transport soil, scrape the ground and pull other machinery. Due to the advantages of high speed, high efficiency, good mobility and light operation, loader has become one of the main types of earthwork construction in engineering construction.