The concrete wet spraying trolley is a device used for concrete spraying operations. It integrates spraying, hydraulic, and walking systems, and is supported by an engineering vehicle chassis. It has strong mobility, rapid transfer, a wide spraying area, and can rotate 360°. The ready-mixed concrete is delivered to the nozzle through a pumping system, and the accelerator is added and then sprayed onto the construction surface. It is highly efficient and highly automated, and can spray a large amount of concrete per hour. It can accurately control the mix ratio and the amount of accelerator to ensure the spraying quality, and can adapt to construction surfaces of different shapes. It also has the advantages of a large construction range, low rebound rate, and less dust. It is widely used in tunnels, mines, culverts, building foundation pit support and other projects