Mid-infrared emission spectroscopic property of Er3+/Nd3+ co-doped bismuth germanate glasses pumped by 808 nm excitation is discussed. The absorption transition parameters of Er3+ are estimated by Judd-Ofelt theory. For the luminescence of 2.7 mm, the as-made glasses is qualified with higher spontaneous transition probability (58.46 s-1) and larger calculated emission cross section (8.34×10-21 cm2). The large energy transfer probability rate between Er3+ and Nd3+ indicate that the co-doping Nd3+ greatly enhances the 2.7 μm emission of Er3+, and this might indicate that this glass is potentially applicable materials for mid-infrared laser devices.