A high-loading-force intermediate-speed coal mill comprises a motor, a speed reducer, a lower frame body, an intermediate frame body, a separator, milling plate assemblies, a milling roller assembly,a pressurizing device, a pulling rod mechanism, a hydraulic system, a slag discharging device, a lubricating system and a foundation. The high-loading-force intermediate-speed coal mill is characterized in that the quantity of the milling roller assemblies and the hydraulic loading oil cylinders is changed from three to four on the premise that the maximum loading pressure of the coal mill remains; four milling rollers are distributed at equal intervals on a milling plate; and roller sleeves in the milling roller assembly are in shape of centripetal circular arc shaped bowl on that basis thata milling mold line is circular arc shaped, namely, the sections of the roller sleeves are changed from tyre shape into circular arc waist shape. The high-loading-force intermediate-speed coal mill has the active effects that the raw coal breaking efficiency of the milling rollers within unit time is improved; the raw coal circulation ratio is reduced, and the output force of the coal mill is increased; the roller sleeves which are in shape of the centripetal circular arc shaped bowl are adopted in the milling roller assembly; the mold line of a milling plate tile fits each milling roller sleeve, so that the linear speed difference between the milling roller sleeves and the milling plate tile can be reduced; and the abrasion of the outer side parts of the roller sleeves is reduced.