NOVELTY - A mixed fuel comprises materials with the following weight ratio, 2-4.5 parts of combustive sludge, and 1 part of biomass.    USE - The mixed fuel is useful for industrial applications.    ADVANTAGE - The invention provides mixed fuel with good combustion effect.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are:    (1) a method of manufacturing the mixed fuel; and a mixed fuel forming machine for manufacturing the mixed fuel comprising a main hydraulic system (20) having the main oil cylinder (1), a feeding hydraulic system (4) having the feeding oil cylinder (5), a feeder, a forming mould, a stander, where main oil cylinder and the feeding oil cylinder are separately mounted on the stander; the feeder comprises a material tank (6); the forming mould comprises a secondary mould plate (9), a mould guide plate (15), a main mould plate (17), a mould box (10), a punch (14); the mould box is mounted on the stander; the upside of the mould box has an inlet; the mould box has an outlet; the material tank is set on the mould box at the inlet; the secondary mould plate is set in the mould box at the outlet; the mould guide plate is set in the mould box opposite to the secondary mould plate; the lower side wall of the mould guide plate, secondary mould, mould box has a material containing bin (8); the material containing bin corresponds to the inlet on the upside; the lower end of the feeding oil cylinder is equipped with a material push plate; the material push plate is located in the material tank upon the inlet; the material push plate corresponds to the inlet; the mould guide plate has a punch hole (16); the secondary mould has a forming through hole; the forming through hole comprises a large forming hole (13) at the near end and the small forming hole (12) at the remote end; the small forming hole corresponds to the outlet at the outer side; the large forming hole and the small forming hole are bridged via the conical hole (11); the main mould plate is mounted on the main oil cylinder; the punch is mounted on the outer side of the main mould plate; and the punch runs through the punch hole, and material containing bin to enter into the large forming hole.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the mixed fuel forming machine for manufacturing the mixed fuel.    Main oil cylinder; (1)    Feeding hydraulic system; (4)    Feeding oil cylinder; (5)    Material tank; (6)    Material push plate; (7)    Material containing bin; (8)    Secondary mould plate; (9)    Mould box; (10)    Conical hole; (11)    Small forming hole; (12)    Large forming hole; (13)    Punch; (14)    Mould guide plate; (15)    Punch hole; (16)    Main mould plate; (17)    Main hydraulic system (20)