The invention discloses a rectangular pipe jacking construction technology, and particularly discloses a construction method for opening a hole between rectangular pipe jacking channels. The construction method comprises the following steps: construction preparation, freezing hole construction, freezing station mounting, active freezing and maintenance freezing, excavating and building construction, freezing hole plugging, and thaw settlement grouting. Through the arrangement of a freezing hole, and arrangement of preventive measures in the construction process of the freezing hole, the construction safety and the construction effect are ensured; for contact channel excavating and building construction, earth excavation is carried out in a layering and blocking removal way, so that the structural stability after contact channel construction is ensured and damage to a surrounding structure is small; after completion of the contact channel construction, the thaw settlement grouting is performed through grouting holes preserved in the two sides of the hole opened between the pipe jacking channels, and preserved in a top plate and a bottom plate, so that ground settlement and structural deformation are controlled; by the construction method, the construction problem of the hole between the rectangular pipe jacking channels is solved, the construction process is safe, the opened channel structure is stable and reliable, and the construction efficiency is high.