The invention provides a method for repairing a
bone tissue by utilizing 3D printing double-component hydrogel. The method comprises the following steps: spraying out hydrogel A and hydrogel B througha double-spray-head 3D printer, and performing reaction to generate
calcium silicate in situ in a
deposition process, thereby realizing bone repair; the hydrogel A is prepared from the following components in parts by weight: 40-50 parts of methacryloyl glycinamide hydrogel, 10-15 parts of monetite, 13-18 parts of
calcium sulfate, 0.3-0.6 part of a
nonionic surfactant and 16.4-36.7 parts of ethylacetate; and the hydrogel B is prepared from the following components in parts by weight: 22-30 parts of
silicon dioxide gel, 18-26 parts of
silicic acid, 25-32 parts of
polylactic acid staples, 0.2-0.5 part of a zwitterionic surfactant and 11.5-34.8 parts of
ethanol. The method can effectively realize precise and compact bone repair through reactive
crystallization of the double-component gel which can be stored for a long time independently, is high in curing rate of repaired bones, is good in adhesion property, is good in
biocompatibility, and greatly improves the
bone injury heal effect;and moreover, the whole
repair method is simple to operate, adopts easily available raw materials, is low in cost, and can be popularized and applied.