The invention discloses a material receiving device and a bin inner wall protecting method. The material receiving device comprises a bin body composed of a vertical wall and a discharge inclined wall. A transverse material baffle is arranged on the discharge inclined wall. The transverse material baffle and the discharge inclined wall are perpendicular or form an acute angle upwards and are transversely and ceaselessly laid on the periphery of the bin body in a circle, and multiple rows of transverse material baffles are longitudinally laid on the bin body at intervals. The material receiving device is simple in structure, convenient to operate, rapid to install, durable and practical; waste material recycling conforms to the environment protection concept; practical experience of many years shows that material deposit and adhesive protection are adopted, protecting liner plates can hardly be damaged, and the service life of the device can be prolonged and secondary overhaul can not happen after primary reinforcing; the device is free of toxin and is environmentally friendly; noise can be reduced, and existing vibration of the device can be reduced; the small liner plates are spliced one by one, and if the liner plates are hit to fall by accident, belt conveyors and other devices on the lower side can not be damaged; the liner plates are free of aging damage; the material receiving device is one-time investment, needs small repairing and is more economical and practical.