The utility model provides an extrusion type weak surrounding rock tunnel prestressed anchorage suo qun supporting construction, the ground tackle anchor is passed through in first layer preliminary bracing (7) on the surface in wherein the fast anchor rope (1) of hunch portion accuse and side wall accuse fast anchor rope (2), hunch portion spacing anchor rope (3) and the spacing anchor rope of side wall (4) are through the ground tackle anchor in second floor preliminary bracing (8) on the surface, hunch portion lock foot anchor rope (5) through the ground tackle anchor in first layer preliminary bracing (7) on the surface, side wall lock foot anchor rope (6) through the ground tackle anchor in second floor preliminary bracing (8) on the surface. Has realized the controlled release to stress in surrounding rock, has reduced the surrouding rock deformation rate of rise and warp the cumulant, the emergence of effectual control large deformation, avoid warping too big arouse to tear opentrade the steel bow member, reduce the risk that the country rock collapses, and, improved the work efficiency, make things convenient for the constructor operation of driling, ensure that the anchorrope position is accurate, stretch -draw in time.