PURPOSE: To attain the protective work for slope by using slope forms of a small cross section by a method in which prestressed concrete slope forms are set on a slope and fixed by anchors fixed to the ground in a tensed condition.

CONSTITUTION: Concrete is placed under a condition that a tension is applied to PC steel materials to form a prestressed concrete slope form 1. The form 1 is set on a slope 2, and anchors 3 are driven through the form 1 into the ground and fixed to the form 1 under a tensed condition. The cross section of the slope form 1 for securing the same bearing capacity can thus be made smaller, permitting economical slope protection work to be performed.