Roadheader-borne hydraulic multifunctional temporary supporting machine

The utility model discloses a roadheader-borne hydraulic multifunctional temporary supporting machine capable of obliquely supporting a top rack, enlarging supporting area of roadway roof, and guaranteeing safe construction. The supporting machine in the utility model comprises a roof rack (1), a folding oil cylinder (7), and a hoist cylinder (6), the hoist cylinder (6) is connected with a stand pipe (4), and the external of the hoist cylinder is provided with a stand sleeve (50), the bottom end of the stand pipe (4) is provided with a roof rack oil cylinder (2), the two sides of the roof rack (1) are movably connected with the stand pipe (4) and the roof rack oil cylinder (2) via crossheads (3), the upper board of the crosshead (3) is provided with a flat hole (10), the front side of the roof rack (1) is provided with a front-extending rack (11) and a front-extending oil cylinder (8), and the two sides of the roof rack (1) are provided with a side-extending rack (12) and a side-extending oil cylinder (9). Th