As the high concrete strength,large size andsevere service environment for super-large section tunnel which includes the precast immersed tube and the cast-in-suit tunnel in the artificial island of Hong Kong-Zhuhai-Macao bridge,crack control of concrete is difficult.Harmful cracks can be controlled effectively by a series of treatment measures during the construction period such as precasting in the factory,one-piece casting,controlling concrete raw material temperature,mixing concrete with ice shavings and cooling water,setting up automatic curing system for the precast immersed tube and reasonable layered and segmented,water pipe cooling,compensating contraction concrete for the cast-in-situ tunnel.Moreover,the harmful crack does not appear in both the precast immersed tube and the cast-in-situ tunnel appear and the prospective objective of temperature control is achieved.