Backward bent duct buoy (BBDB) is a high-efficiency wave energy converter. It can be paralleled to form a wave energy farm. In this paper, a wave energy converter (WEC) array composed of three parallel BBDBs was tested. The array's performance and properties were reported. And, an effective method to improve the arrays' energy-capturing ability by setting the spacing above zero was proposed and verified. This method is helpful for the construction of BBDB wave energy farm.