The invention discloses a self-standing two-claw manhole cover opening tool. The middle of a load bearing bar is connected with two supporting bars which can be respectively strutted to two sides by rolling bearings; two end parts of the load bearing bar are connected with two suspension bars capable of rotating at multiple angles by knuckle bearings so as to adapt to manhole covers of different diameters or structures; the supporting bars perform a supporting function on the load bearing bars and the suspension bars to cause the load bearing bars and the suspension bars to keep a standing state; the lower end part of each supporting bar is provided with a supporting foot parallel with the load bearing bar; the supporting feet can be used for enlarging a contact area between the supporting bars and the ground and perform an anti-skidding function; the lower end of each suspension bar is provided with a suspension hook or a grabbing hook which is suitable for the manhole cover of which the holding point is a lifting lug or a hole; a cover plate can horizontally rotate, the supporting feet and the suspension bars can be respectively folded when the self-standing two-claw manhole cover opening tool is not used, and therefore, the size of the tool can be reduced. The self-standing two-claw manhole cover opening tool has the advantages and effects of convenience in opening and closing the manhole cover, low labor intensity, high working efficiency, good operation safety and convenience in storage and carrying, and the manhole cover can be prevented from being damaged.