Abstract: The present invention provides a work control system for a trencher type excavator for soil cement wall, wherein in controlling the work of forming a soil cement wall carried out in the procedure such that a cutter post provided on a trencher type excavator for soil cement wall and having a chain cutter wound endlessly is inserted into the object ground, the cutter post is rotated while discharging a ground filler out of a discharge opening provided in the cutter post, and the cutter post is moved in a lateral direction of the ground, execution width of the soil cement wall based on a fixed work load, and filling quantity of the ground filler at each position of the soil cement wall forming work are displayed on a two-dimensional coordinate in a lateral axis and a longitudinal axis, respectively.