The invention discloses a growing method of lithium gadolinium borate crystal, relating to the field of crystal growth. The invention is characterized in that crystal growing material is developed by using a pulling method; the chemical formula of the lithium gadolinium borate crystal is Li6CexGd1-xB3O9, wherein, x is larger than 0 and is 0.1 at most; when the crystal is developed by using the pulling method, a special graphite in which the lower part is in arc shaped or the bottom is tapered serves as a growing graphite. The invention uses the special graphite and a post heating device to overcome the defect that the lithium gadolinium borate crystal developed by using the pulling method is easy to form a concave interface or is hard to grow into big diameter while common cylindrical graphite is used. The crystal developed by using the method has the advantages of big size, high optical quality and the like, can be used for neutron detection and can be used for detecting alpha, beta, gamma rays and the like.