(1) Crawler excavator. Crawler excavator has the advantages of low center of gravity, small ground pressure ratio and strong trafficability, so large and medium-sized excavators mostly adopt this form.

　　(2) Wheel excavator. The tyre excavator is a special chassis with increased track width to increase its stability, and has hydraulic outriggers that can be extended and retracted as required. The characteristics of the rubber tyred excavator are flexible, it can transfer the construction site quickly without damaging the road surface, but its stability is poor, many small hydraulic excavators mostly use this kind of walking device. Generally, the municipal engineering units usually use the rubber tyred excavator to excavate various pipelines and carry out daily maintenance and repair.

　　(3) Automotive excavator. Automobile excavator runs faster than tire excavator, others are similar to tire excavator.

　　Bulk wholesale.