Objective To research the diagnosis value in color Doppler ultrasound on traumatic retinal detachment. Methods 30 cases(30 eyes)with traumatic retinal detachment were confirmed by B-mode ultrasonography and surgery. The characteristics and blood flow were observed by color Doppler ultrasound. Results 30 cases, among partial detachment in 18 cases, completely detachment in 9 cases, old detachment in 2 cases, and completed with detachment of choroids in 1 case;30 cases, greater than 0.1 in 7 eyes ( 23.3% ), 0. 01 ～0. 1 in 10 eyes (33.3%),counting fingers in 4 eyes( 13.3% ) ,manual in 5 eyes ( 16.6% ) ,no light perception in 4 eyes( 13.3% ); The visual acuity in patients after treatment had significantly increased compared with before treatment( χ2 =7. 394 ,P =0. 015 );The lower intraocular pressure of retinal hemorrhage, serous choroidaland hemorrhagic choroidal had no significant difference[4 eye(33. 3% ) ,4 eye(33. 3% ) ,4 eye(33.3% ) ,respectively] (χ2 =3. 004,P=0. 343). Conclusion The color doppler ultrasound diagnosis in traumatic retinal detachment, with its capacity of early finding and accurate and reliable, have significant meaning to clinical treatment and prognosis.