Commercial vehicle mudguard convenient to install

The utility model discloses a commercial vehicle fender convenient to install, which comprises a wheel protecting plate, hollow fixing blocks are arranged on two sides of the wheel protecting plate, connecting devices are arranged on the hollow fixing blocks, fender assemblies are arranged on the connecting devices, and the connecting devices comprise first sliding rods, second sliding rods and elastic assemblies. An elastic assembly is arranged between the first sliding rod and the second sliding rod, one end of the first sliding rod and one end of the second sliding rod are slidably arranged on the inner wall of the hollow fixing block, the other end of the first sliding rod and the other end of the second sliding rod penetrate out of the hollow fixing block, and a first fixing block is arranged on one side of the first sliding rod. A second fixing block is arranged on one side of the second sliding rod, the elastic assembly comprises a bearing block, a connecting rod, a piston plate and a spring, the sprin