The invention discloses a construction device of a joint-free continuous in-situ diaphragm wall and a curtain construction method.The construction device of the joint-free continuous in-situ diaphragm wall comprises a supporting mechanism, a
cutting mechanism, a power mechanism, a crushed material collecting and screening mechanism and an anti-seepage material preparing and producing mechanism, and the
cutting mechanism is connected with the input end of the crushed material collecting and screening mechanism through a stratum crushed material output
pipe; the qualified crushed material output end of the crushed material collecting and screening mechanism is connected with the input end of the anti-seepage material preparing and producing mechanism, and through the
cutting mechanism, the power mechanism, the crushed material collecting and screening mechanism and the anti-seepage material preparing and producing mechanism, the depth of the curtain is guaranteed, meanwhile, transverse continuous cutting and grooving construction of the
water cut curtain is achieved, and the construction efficiency is improved. The construction efficiency and the water interception effect of the water interception curtain are enhanced; and in the transverse continuous cutting wall forming process, the in-situ material is used for preparing an anti-seepage material, the in-situ anti-seepage wall is formed, and the technical problems that in the prior art, the strength of a
curtain wall is insufficient, and the water interception efficiency is poor due to the large number of water interception curtain connectors are solved.