Low-cost shotcrete and preparation method thereof

The invention discloses low-cost shotcrete and a preparation method thereof. The low-cost shotcrete comprises the following raw materials in parts by weight: 180-220 parts of water, 425-455 parts of Portland cement, 922-960 parts of gravels, 496-640 parts of desert sand, 7-10 parts of an accelerator, 14-20 parts of a tackifier and 3-6 parts of a water reducing agent. Desert sand which is wide in source, low in price and easy to obtain is selected to completely replace machine-made sand, the raw material cost of the low-cost shotcrete is greatly reduced, and the low-cost shotcrete is environmentally friendly and has extremely high economic benefits; the desert sand, the gravels, the Portland cement, the accelerator, the water reducing agent and the tackifier are combined for use, and the weight parts of all the components are coordinated, so that the shotcrete still has the strength meeting the construction requirement after the desert sand is used for completely replacing machine-madesand, and the strength of