This paper presents a method of measuring area sinusoidal vibration mode shapes using uniform-rate raster scan with continuous scanning laser Doppler vibrometry (CSLDV). In the method, laser point scans continuously on the tested surface at uniform rate by controlling beam-deflection mirrors in LDV. Firstly, basic theories of uniform-rate raster scan with CSLDV are introduced and methods of delay removal, filter choosing, coordinate transformation in operating deflection shape (ODS) demodulation are studied. Then, the process is used on a steel rectangular plate under single frequency sinusoidal excitation and ODS is demodulated. Finally, modal tesing is conducted using scanning LDV and the modal assurance criterion (MAC) between tested ODS and tested mode shapes are calculated. The result shows that ODS obtained by the proposed method is very close to the mode shapes and can be used as mode shapes with high spatial resolution. CSLDV is a time efficient method to obtain mode shapes with high spatial resolution and has important application value.