Objective To investigate MR features of lymphangioma in fossa orbitalis, and to improve diagnostic accuracy per operation. Material and Methods MRI features of orbitalis lymphangioma in 20 cases were retrospectively analyzed. All the twenty cases performed MR examination, 17 among them performed dynamic enhancement. Results In all the twenty cases, 5 were localized lymphangioma with 3 in muscle cone outer space and 2 within muscle cone clearance. 2 were isolated cyst type. 3 were multiple cyst type. 15 were diffuse lymphangioma with involvement of muscle cone outer space and muscle cone clearance. Among them, eyelids were involved in 4 cases, and lacrimal sac was involved in one case. 2 were isolated cyst type, and 13 were multiple cyst type. Localized lymphangioma demonstrated located round-like mass, with regular or irregular well defined border. Diffuse lymphangioma demonstrated diffused irregular mass with ill defined border and inhomogenous signal. MR imaging characteristic: 2 case show homogenous long T1 and long T2 signal compared to extraocular muscles. 18 cases show high and low mixed signal. After contrast, 14 cases show slight to midrange enhancement. No enhancement in 3 cases. Conclusions MRI could accurately demonstrate the location and morphologic change of orbitalis lymphangioma with high diagnosis value，especially for internal signal alternation of the tumor, which provided reliable foundation for clinical operation projection.