The invention relates to an automatic building all-in-one machine for high-speed rail station square floor tiles. The automatic building all-in-one machine comprises a crawler traveling device, wheel type traveling devices, an electric rotary table, a three-degree-of-freedom parallel mechanism, a sucking device and a tile joint mud filling device. The wheel type traveling devices are symmetrically arranged on the left side and the right side of the crawler traveling device. The electric rotary table is located in the center of the upper end of the crawler traveling device. The three-degree-of-freedom parallel mechanism is located between the electric rotary table and the sucking device, the lower end of the three-degree-of-freedom parallel mechanism is connected with the electric rotary table, and the upper end of the three-degree-of-freedom parallel mechanism is connected with the sucking device. The tile joint mud filling device is located over the sucking device. According to the automatic building all-in-one machine for the high-speed rail station square floor tiles, multiple functions such as composite traveling, multi-degree-of-freedom position adjusting, floor tile sucking and tile joint mud filling and fixing are integrated, tile paving operation can be conducted on municipal sidewalks, the automation degree is high, the paving speed is high, the paving attractiveness is high, and the problems that according to an existing floor tile paving mode, the appropriated labor is high, the paving efficiency is low, and the paving cost is high are solved.