The invention discloses a production method for producing a heat insulation board for a vacuum heat insulation wall body by utilizing small expanded and vitrified balls, and the method comprises the following steps: putting the small expanded and vitrified balls, glass fiber, silica fume, bentonite and a getter into a stirring kettle, adding a wetting agent and a bonding agent, and stirring for forming a paste-like material; uniformly spreading the well stirred paste-like material on a micro-wave baking line according to the required thickness for baking, and further cutting into blocks when the water content in the board is below 1%; further placing the board which is cut into the blocks on a vacuum machine assembly line and vacuum pumping till the vacuum degree is below 200Pa; and cutting and packaging the heat insulation board for the vacuum heat insulation wall body. By applying the method provided by the invention for production, the process is simple, the emission of three wastes can be avoided, the produced heat insulation board for the vacuum heat insulation wall body is easy to construct, the fireproof property can be realized, the heat insulation board for the vacuum heat insulation wall body can play great roles in heat preservation and heat insulation, the combustion performance is grade A, the weight is light, the weather-resistant time is long, and the service life can be above 30 years.