This paper presents the constructing methods of using rock geotextile fabrics and stone cage sinking to rainforce the dyke of boundary river as the example of left hand at Lianhua River of Jiejinkou Town in Tongjiang City of middle and lower reaches of Heilongjiang River.

Because the international river bank soil erosion seriously, prevention method is recessary, and the main forms of prevention engineering are: wicker mat sinking to press stones, starch building stone to rainforce foot, dry_laid stone to prevent bank.