Supporting and loading device for building material loading and unloading

The invention relates to the technical field of building material loading and unloading, in particular to a supporting and loading device for building material loading and unloading. The supporting and loading device for building material loading and unloading comprises a traveling platform, wherein cross bars are fixedly connected onto two movable sleeves and are arranged in parallel; a pluralityof roller bodies are rotatably arranged at equal intervals between the two cross bars in the length direction; the two movable sleeves are fixedly connected through a connecting plate; a connecting rod is fixedly arranged on the outer side surface of the connecting plate; a vertical plate is fixedly arranged at the tail end of the outer side of the connecting rod; a pushing mechanism is arrangedon the upper part of the vertical plate; a drive mechanism is fixedly arranged on the lower part of the vertical plate; a cargo fixing mechanism in transmission connection with the drive mechanism isfixedly arranged between th