In this article, on basis of the properties of the soft muddy ground, the authors analyze the mechanisms of consolidation grouting in  mud ground, introduce the grouting materials of mud ground, i.e., the cementwater glass grout in terms of setting time, compressive strength and chemical reaction mechanisms. In addition, on basis of the case of Fuxin Street underground crossing tunnel in Fuzhou city, the authors present the grouting materials, grouting parameters, grouting process and grouting result checking in mud ground.