The invention provides a high-pressure manifold device suitable for an annulus sand adding and cracking technology. The high-pressure manifold device comprises three pipelines. The first pipeline sequentially comprises a first check valve, a first T-shaped tee joint connected with the outflow end of the first check valve, a first screw plug connected with the first T-shaped tee joint and a second T-shaped tee joint connected with the first screw plug from left to right, and a casing pressure measurement sensor is connected to the second T-shaped tee joint. The second pipeline sequentially comprises a second check valve, a four-way connected with the outflow end of the second check valve and a second screw plug connected with the four-way from left to right. The third pipeline sequentially comprises a third screw plug, a third check valve, a third T-shaped tee joint connected with the outflow end of the third check valve and a fourth T-shaped tee joint connected with the third T-shaped tee joint; an oil pressure measurement sensor is connected to the fourth T-shaped tee joint; the four-way is connected with the first T-shaped tee joint and connected with the third T-shaped tee joint through the fourth screw plug. By means of the high-pressure manifold device, replacement of vehicles in the construction process is reduced, cracking construction efficiency is improved, labor intensity is lowered, and construction is made to be safe, convenient, fast and reliable.