The utility model relates to a major diameter earth pressure balance shield blade disc, it includes blade disc outer lane, blade disc inner circle, long spoke, short spoke and central fish tail sword,wherein, blade disc outer lane and the coaxial setting of blade disc inner circle, and the blade disc inner circle sets up in the blade disc outer lane, long spoke is evenly arranged and is circled in blade disc outer lane, blade disc, short spoke is arranged on the blade disc outer lane, and its and long spoke interval arrangement, install the smear metal sword and the sword of going ahead of the rest on long spoke and the short spoke, center fish tail sword is arranged in the central authorities of blade disc inner circle. The utility model discloses a major diameter earth pressure balanceshield blade disc adopts the spoke type blade disc, has the structural strength height, and advantages such as the big just long service life of central aperture ratio are applicable to the earth pressure balance shield equipment that the diameter is greater than 8m.