A new-type computer generated hologram(CGH) was described.By adding positive and negative quadratic phase factor on object spectrum,the four independent images can be generated in four different directions.Four-channel generated hologram can be achieved in this way,and omit imaging lens.In addition,we can also obtain reconstructed images of rotation,shear and inversion,by a coordinate transformation.This CGH can conveniently display the change of images of four objects or one object.In this paper,four English alphabets is coded and focused in four directions respectively.It is found that if the mode of the code is different,the reconstructed images are also different.Furthermore,the reconstructed image is very clear,and signal-to-noise ratio is also rather high.All results show that mode of the code is feasible.